cleanup: Require "dangling" commas

Since ES5, trailing commas in arrays and object literals are valid.
We generally haven't used them so far, but they are actually a good
idea, as they make additions and removals in diffs much cleaner.

https://gitlab.gnome.org/GNOME/gnome-shell/merge_requests/805

js/ui/search.js

@@ -159,7 +159,7 @@ var SearchResultsBase = GObject.registerClass({
             'focus-child', 'focus-child', 'focus-child',
             GObject.ParamFlags.READABLE,
             Clutter.Actor.$gtype),
-    }
+    },
 }, class SearchResultsBase extends St.BoxLayout {
     _init(provider, resultsView) {
         super._init({ style_class: 'search-section', vertical: true });
@@ -426,7 +426,7 @@ class GridSearchResults extends SearchResultsBase {
 });
 
 var SearchResultsView = GObject.registerClass({
-    Signals: { 'terms-changed': {} }
+    Signals: { 'terms-changed': {} },
 }, class SearchResultsView extends St.BoxLayout {
     _init() {
         super._init({ name: 'searchResults', vertical: true });