ags: add config option for gtk anim duration

.config/ags/modules/bar/normal/system.js

@@ -88,7 +88,7 @@ const BarBattery = () => Box({
     className: 'spacing-h-4 txt-onSurfaceVariant',
     children: [
         Revealer({
-            transitionDuration: 150,
+            transitionDuration: userOptions.animations.durationSmall,
             revealChild: false,
             transition: 'slide_right',
             child: MaterialIcon('bolt', 'norm', { tooltipText: "Charging" }),
@@ -133,7 +133,7 @@ const BarGroup = ({ child }) => Widget.Box({
 });
 const BatteryModule = () => Stack({
     transition: 'slide_up_down',
-    transitionDuration: 150,
+    transitionDuration: userOptions.animations.durationLarge,
     children: {
         'laptop': Box({
             className: 'spacing-h-4', children: [