Fix library scrolling

For good this time, I hope.  As implemented, we always want that
container to take 100% height, handle its own padding,  and scroll
internal contents.

client/src/style/scss/library.scss

@@ -1,10 +1,10 @@
 @import "theme/blue.scss";
 
 .library_style_container {
-    width: 95%;
-    margin: auto;
-    margin-top: 1em;
-    overflow: auto !important;
+    width: 100%;
+    height: 100%;
+    padding: 1em;
+    overflow: auto;
 
     .fa-globe,
     .fa-shield,