Revert "pass post tags as array to ember-cli-selectize"

This reverts commit efff6f62ae.

core/client/app/controllers/post-settings-menu.js

@@ -174,11 +174,6 @@ export default Controller.extend(SettingsMenuMixin, {
         this.set('debounceId', debounceId);
     },
 
-    // this exists because selectize throws errors on transition if it doesn't
-    existingTags: computed('model.tags.[]', function () {
-        return this.get('model.tags').toArray();
-    }),
-
     // live-query of all tags for tag input autocomplete
     availableTags: computed(function () {
         return this.get('store').filter('tag', {limit: 'all'}, () => {

core/client/app/templates/post-settings-menu.hbs

@@ -41,7 +41,7 @@
                 {{gh-selectize
                     id="tag-input"
                     multiple=true
-                    selection=existingTags
+                    selection=model.tags
                     content=availableTags
                     optionValuePath="content.uuid"
                     optionLabelPath="content.name"