Fixes for Trackster and Circster, mostly around preference selection and usage.

static/scripts/utils/config.js

@@ -32,7 +32,7 @@ var ConfigSetting = Backbone.Model.extend({
      * Cast and set value. This should be instead of
      *  setting.set('value', new_value)
      */
-    set_value: function(value) {
+    set_value: function(value, options) {
         var type = this.get('type');
 
         if (type === 'float') {
@@ -43,7 +43,7 @@ var ConfigSetting = Backbone.Model.extend({
         }
         // TODO: handle casting from string to bool?
 
-        this.set('value', value);
+        this.set({value: value}, options);
     }
 }, {
     // This is a master list of default settings for known settings.
@@ -101,10 +101,10 @@ var ConfigSettingCollection = Backbone.Collection.extend({
     /**
      * Set value for a setting.
      */
-    set_value: function(key, value) {
+    set_value: function(key, value, options) {
         var s = this.get(key);
         if (s) {
-            return s.set_value(value);
+            return s.set_value(value, options);
         }
 
         return undefined;

static/scripts/viz/circster.js

@@ -620,8 +620,13 @@ var CircsterTrackView = Backbone.View.extend({
         $.when(track.get('data_manager').get_genome_wide_data(this.genome)).then(function(genome_wide_data) {
             // Set bounds.
             self.data_bounds = self.get_data_bounds(genome_wide_data);
-            track.get('config').set_value('min_value', self.data_bounds[0]);
-            track.get('config').set_value('max_value', self.data_bounds[1]);
+
+            // Set min, max value in config so that they can be adjusted. Make this silent
+            // because these attributes are watched for changes and the viz is updated
+            // accordingly (set up in initialize). Because we are setting up, we don't want 
+            // the watch to trigger events here.
+            track.get('config').set_value('min_value', self.data_bounds[0], {silent: true});
+            track.get('config').set_value('max_value', self.data_bounds[1], {silent: true});
 
             // Merge chroms layout with data.
             layout_and_data = _.zip(chrom_arcs, genome_wide_data),

static/scripts/viz/trackster/tracks.js

@@ -994,7 +994,8 @@ var TracksterView = Backbone.View.extend({
                             };
                         }));
                     });
-                }
+                },
+                minLength: 2
             });
         });
         if (this.vis_id !== undefined) {

static/scripts/viz/visualization.js

@@ -894,7 +894,7 @@ var BackboneTrack = Backbone.Model.extend(CustomToJSON).extend({
 
         // -- Set up config settings. -- 
         var models =  [
-            { key: 'name', value: this.get('dataset').get('name') },
+            { key: 'name', default_value: this.get('dataset').get('name') },
             { key: 'color' },
             { key: 'min_value', label: 'Min Value', type: 'float', default_value: 0 },
             { key: 'max_value', label: 'Max Value', type: 'float', default_value: 1 }