diff --git a/client/src/components/Workflow/Invocations.test.js b/client/src/components/Workflow/Invocations.test.js
index f273d0a1729..7f40f14e053 100644
--- a/client/src/components/Workflow/Invocations.test.js
+++ b/client/src/components/Workflow/Invocations.test.js
@@ -73,12 +73,12 @@ describe("Invocations.vue with invocation", () => {
         expect(rows.length).toBe(1);
         const row = rows[0];
         const columns = row.findAll("td");
-        expect(columns.at(0).text()).toBe("workflow name");
-        expect(columns.at(1).text()).toBe("history name");
-        expect(columns.at(2).text()).toBe(moment.utc(invocationData.create_time).fromNow());
-        expect(columns.at(3).text()).toBe(moment.utc(invocationData.update_time).fromNow());
-        expect(columns.at(4).text()).toBe("scheduled");
-        expect(columns.at(5).text()).toBe("");
+        expect(columns.at(1).text()).toBe("workflow name");
+        expect(columns.at(2).text()).toBe("history name");
+        expect(columns.at(3).text()).toBe(moment.utc(invocationData.create_time).fromNow());
+        expect(columns.at(4).text()).toBe(moment.utc(invocationData.update_time).fromNow());
+        expect(columns.at(5).text()).toBe("scheduled");
+        expect(columns.at(6).text()).toBe("");
     });
 
     it("toggles detail rendering", async () => {
diff --git a/client/src/components/Workflow/Invocations.vue b/client/src/components/Workflow/Invocations.vue
index ee35740bba1..9c1ee0bc82d 100644
--- a/client/src/components/Workflow/Invocations.vue
+++ b/client/src/components/Workflow/Invocations.vue
@@ -20,7 +20,8 @@
                 striped
                 caption-top
                 :busy="loading"
-                fixed>
+                fixed
+                class="invocations-table">
                 <template v-slot:row-details="row">
                     <b-card>
                         <small class="float-right" :data-invocation-id="row.item.id">
@@ -31,25 +32,39 @@
                             @invocation-cancelled="$emit('reload-invocations')" />
                     </b-card>
                 </template>
-                <template v-slot:cell(workflow_id)="data">
+                <template v-slot:cell(expand)="data">
                     <b-link
-                        class="toggle-invocation-details"
-                        v-b-tooltip
-                        title="Show Invocation details"
-                        href="#"
-                        @click.stop="swapRowDetails(data)">
-                        <b>{{ getWorkflowNameByInstanceId(data.item.workflow_id) }}</b>
-                    </b-link>
+                        v-b-tooltip.hover.top
+                        title="Show Invocation Details"
+                        class="btn-sm fa fa-chevron-down toggle-invocation-details"
+                        v-if="!data.detailsShowing"
+                        @click.stop="swapRowDetails(data)" />
+                    <b-link
+                        v-b-tooltip.hover.top
+                        title="Hide Invocation Details"
+                        class="btn-sm fa fa-chevron-up toggle-invocation-details"
+                        v-if="data.detailsShowing"
+                        @click.stop="swapRowDetails(data)" />
+                </template>
+                <template v-slot:cell(workflow_id)="data">
+                    <div
+                        v-b-tooltip.hover.top
+                        :title="getWorkflowNameByInstanceId(data.item.workflow_id)"
+                        class="truncate">
+                        <b-link href="#" @click.stop="swapRowDetails(data)">
+                            <b>{{ getWorkflowNameByInstanceId(data.item.workflow_id) }}</b>
+                        </b-link>
+                    </div>
                 </template>
                 <template v-slot:cell(history_id)="data">
-                    <b-link
-                        id="switch-to-history"
-                        v-b-tooltip
-                        title="Switch to History"
-                        href="#"
-                        @click.stop="switchHistory(data.item.history_id)">
-                        <b>{{ getHistoryNameById(data.item.history_id) }}</b>
-                    </b-link>
+                    <div
+                        v-b-tooltip.hover.top.html
+                        :title="`<b>Switch to History:</b><br>${getHistoryNameById(data.item.history_id)}`"
+                        class="truncate">
+                        <b-link id="switch-to-history" href="#" @click.stop="switchHistory(data.item.history_id)">
+                            <b>{{ getHistoryNameById(data.item.history_id) }}</b>
+                        </b-link>
+                    </div>
                 </template>
                 <template v-slot:cell(create_time)="data">
                     <UtcDate :date="data.value" mode="elapsed" />
@@ -94,12 +109,13 @@ export default {
     },
     data() {
         const fields = [
-            { key: "workflow_id", label: "Workflow" },
-            { key: "history_id", label: "History" },
-            { key: "create_time", label: "Invoked" },
-            { key: "update_time", label: "Updated" },
-            { key: "state" },
-            { key: "execute", label: "" },
+            { key: "expand", label: "", class: "col-button" },
+            { key: "workflow_id", label: "Workflow", class: "col-name" },
+            { key: "history_id", label: "History", class: "col-history" },
+            { key: "create_time", label: "Invoked", class: "col-small" },
+            { key: "update_time", label: "Updated", class: "col-small" },
+            { key: "state", class: "col-small" },
+            { key: "execute", label: "", class: "col-button" },
         ];
         return {
             invocationItemsModel: [],
@@ -145,3 +161,25 @@ export default {
     },
 };
 </script>
+<style scoped>
+.invocations-table {
+    min-width: 40rem;
+}
+.table::v-deep .col-name {
+    width: 40%;
+}
+.table::v-deep .col-history {
+    width: 20%;
+}
+.table::v-deep .col-small {
+    width: 100px;
+}
+.table::v-deep .col-button {
+    width: 50px;
+}
+.table::v-deep .truncate {
+    overflow: hidden;
+    white-space: nowrap;
+    text-overflow: ellipsis;
+}
+</style>
diff --git a/lib/galaxy/model/tags.py b/lib/galaxy/model/tags.py
index 4e3f0d2069a..6f77c1459ac 100644
--- a/lib/galaxy/model/tags.py
+++ b/lib/galaxy/model/tags.py
@@ -2,6 +2,8 @@ import logging
 import re
 from typing import Dict, List, Optional, Tuple
 
+from sqlalchemy.exc import IntegrityError
+from sqlalchemy.orm import sessionmaker
 from sqlalchemy.sql import select
 from sqlalchemy.sql.expression import func
 
@@ -245,7 +247,18 @@ class TagHandler:
         return self.sa_session.query(galaxy.model.Tag).filter_by(name=tag_name).first()
 
     def _create_tag_instance(self, tag_name):
-        return galaxy.model.Tag(type=0, name=tag_name)
+        # For good performance caller should first check if there's already an appropriate tag
+        Session = sessionmaker(self.sa_session.bind)
+        tag = galaxy.model.Tag(type=0, name=tag_name)
+        with Session() as separate_session:
+            separate_session.add(tag)
+            try:
+                separate_session.commit()
+                separate_session.flush()
+            except IntegrityError:
+                # tag already exists, get from database
+                separate_session.rollback()
+        return self._get_tag(tag_name)
 
     def _get_or_create_tag(self, tag_str):
         """Get or create a Tag object from a tag string."""
diff --git a/test/unit/app/managers/test_TagHandler.py b/test/unit/app/managers/test_TagHandler.py
index 7839be7d019..118edddfaa6 100644
--- a/test/unit/app/managers/test_TagHandler.py
+++ b/test/unit/app/managers/test_TagHandler.py
@@ -100,6 +100,12 @@ class TagHandlerTestCase(BaseTestCase):
         self.tag_handler.delete_item_tags(user=self.user, item=hda)
         self.assertEqual(hda.tags, [])
 
+    def test_unique_constraint_applied(self):
+        tag_name = 'abc'
+        tag = self.tag_handler._create_tag_instance(tag_name)
+        same_tag = self.tag_handler._create_tag_instance(tag_name)
+        assert tag.id == same_tag.id
+
     def test_item_has_tag(self):
         hda = self._create_vanilla_hda()
         tags = ['tag1']