If the view doesn't fill the available space, content should still
start at the top rather than the center - not least the positioning
code for folder popups assumes that, so set the appropriate expand
flags.
https://bugzilla.gnome.org/show_bug.cgi?id=694371
_init: function() {
this.parent();
+ this._grid.actor.y_align = Clutter.ActorAlign.START;
+ this._grid.actor.y_expand = true;
+
let box = new St.BoxLayout({ vertical: true });
this._stack = new St.Widget({ layout_manager: new AllViewLayout() });
this._stack.add_actor(this._grid.actor);