cleanup: Use new indentation style for object literals

We have made good progress on object literals as well, although there
are still a lot that use the old style, given how ubiquitous object
literals are.

But the needed reindentation isn't overly intrusive, as changes are
limited to the object literals themselves (i.e. they don't affect
surrounding code).

And given that object literals account for quite a bit of the remaining
differences between regular and legacy rules, doing the transition now
is still worthwhile.

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2200>

js/ui/osdMonitorLabeler.js

@@ -12,12 +12,16 @@ class OsdMonitorLabel extends St.Widget {
 
         this._monitor = monitor;
 
-        this._box = new St.BoxLayout({ style_class: 'osd-window',
-                                       vertical: true });
+        this._box = new St.BoxLayout({
+            style_class: 'osd-window',
+            vertical: true,
+        });
         this.add_actor(this._box);
 
-        this._label = new St.Label({ style_class: 'osd-monitor-label',
-                                     text: label });
+        this._label = new St.Label({
+            style_class: 'osd-monitor-label',
+            text: label,
+        });
         this._box.add(this._label);
 
         Main.uiGroup.add_child(this);