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/messageTray.js

@@ -33,7 +33,7 @@ var State = {
     HIDDEN:  0,
     SHOWING: 1,
     SHOWN:   2,
-    HIDING:  3
+    HIDING:  3,
 };
 
 // These reasons are useful when we destroy the notifications received through
@@ -47,7 +47,7 @@ var NotificationDestroyedReason = {
     EXPIRED: 1,
     DISMISSED: 2,
     SOURCE_CLOSED: 3,
-    REPLACED: 4
+    REPLACED: 4,
 };
 
 // Message tray has its custom Urgency enumeration. LOW, NORMAL and CRITICAL
@@ -58,7 +58,7 @@ var Urgency = {
     LOW: 0,
     NORMAL: 1,
     HIGH: 2,
-    CRITICAL: 3
+    CRITICAL: 3,
 };
 
 // The privacy of the details of a notification. USER is for notifications which
@@ -159,7 +159,7 @@ var NotificationPolicy = GObject.registerClass({
             'details-in-lock-screen', 'details-in-lock-screen', 'details-in-lock-screen',
             GObject.ParamFlags.READWRITE | GObject.ParamFlags.CONSTRUCT_ONLY,
             false),
-    }
+    },
 }, class NotificationPolicy extends GObject.Object {
     // Do nothing for the default policy. These methods are only useful for the
     // GSettings policy.
@@ -357,7 +357,7 @@ var Notification = GObject.registerClass({
         'activated': {},
         'destroy': { param_types: [GObject.TYPE_UINT] },
         'updated': { param_types: [GObject.TYPE_BOOLEAN] },
-    }
+    },
 }, class Notification extends GObject.Object {
     _init(source, title, banner, params) {
         super._init();
@@ -522,7 +522,7 @@ var NotificationBanner = GObject.registerClass({
     Signals: {
         'done-displaying': {},
         'unfocused': {},
-    }
+    },
 }, class NotificationBanner extends Calendar.NotificationMessage {
     _init(notification) {
         super._init(notification);
@@ -747,7 +747,7 @@ var Source = GObject.registerClass({
         'icon-updated': {},
         'notification-added': { param_types: [Notification.$gtype] },
         'notification-show': { param_types: [Notification.$gtype] },
-    }
+    },
 }, class Source extends GObject.Object {
     _init(title, iconName) {
         super._init({ title });
@@ -912,13 +912,13 @@ var MessageTray = GObject.registerClass({
         'queue-changed': {},
         'source-added': { param_types: [Source.$gtype] },
         'source-removed': { param_types: [Source.$gtype] },
-    }
+    },
 }, class MessageTray extends St.Widget {
     _init() {
         super._init({
             visible: false,
             clip_to_allocation: true,
-            layout_manager: new Clutter.BinLayout()
+            layout_manager: new Clutter.BinLayout(),
         });
 
         this._presence = new GnomeSession.Presence((proxy, _error) => {
@@ -1414,7 +1414,7 @@ var MessageTray = GObject.registerClass({
         this._bannerBin.ease({
             opacity: 255,
             duration: ANIMATION_TIME,
-            mode: Clutter.AnimationMode.LINEAR
+            mode: Clutter.AnimationMode.LINEAR,
         });
         this._bannerBin.ease({
             y: 0,
@@ -1424,7 +1424,7 @@ var MessageTray = GObject.registerClass({
                 this._notificationState = State.SHOWN;
                 this._showNotificationCompleted();
                 this._updateState();
-            }
+            },
         });
     }
 
@@ -1490,7 +1490,7 @@ var MessageTray = GObject.registerClass({
             this._bannerBin.ease({
                 opacity: 0,
                 duration: ANIMATION_TIME,
-                mode: Clutter.AnimationMode.EASE_OUT_BACK
+                mode: Clutter.AnimationMode.EASE_OUT_BACK,
             });
             this._bannerBin.ease({
                 y: -this._bannerBin.height,
@@ -1500,7 +1500,7 @@ var MessageTray = GObject.registerClass({
                     this._notificationState = State.HIDDEN;
                     this._hideNotificationCompleted();
                     this._updateState();
-                }
+                },
             });
         } else {
             this._bannerBin.y = -this._bannerBin.height;