js: Split gi imports to be on new lines to prepare for ES modules

Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/2794>

js/ui/pointerA11yTimeout.js

@@ -1,5 +1,8 @@
 /* exported PointerA11yTimeout */
-const { Clutter, GObject, Meta, St } = imports.gi;
+const Clutter = imports.gi.Clutter;
+const GObject = imports.gi.GObject;
+const Meta = imports.gi.Meta;
+const St = imports.gi.St;
 const Main = imports.ui.main;
 const Cairo = imports.cairo;