(js) Improve events display with many categories

UI/Templates/SchedulerUI/UIxAppointmentEditorTemplate.wox

@@ -46,7 +46,13 @@
           </md-input-container>
           <!-- categories -->
           <md-chips ng-model="editor.component.categories">
-            <md-autocomplete
+            <md-chip-template>
+              <span class="sg-chip-color">
+                <span ng-style="{ 'background-color': editor.component.constructor.$categories[$chip] }"><!-- color --></span>
+              </span>
+              <span>{{$chip}}</span>
+            </md-chip-template>
+           <md-autocomplete
                 md-selected-item="editor.categories.selected"
                 md-search-text="editor.categories.searchText"
                 md-items="category in editor.component.constructor.filterCategories(editor.categories.searchText)"