✨ ags: make osd work, new window management system, lots of improvements

ags/window/ControlCenter.ts

@@ -1,12 +1,14 @@
-import { Astal, Gdk, Gtk, Widget } from "astal/gtk3";
+import { Astal, Gtk, Widget } from "astal/gtk3";
 import { QuickActions } from "../widget/control-center/QuickActions";
 import { Tiles } from "../widget/control-center/Tiles";
+import { Sliders } from "../widget/control-center/Sliders";
 
 const widgetsContainer: Widget.Box = new Widget.Box({
     className: "control-center-container",
     orientation: Gtk.Orientation.VERTICAL,
 } as Widget.BoxProps, 
 QuickActions, 
+Sliders,
 Tiles);
 
 export const ControlCenter: Widget.Window = new Widget.Window({
@@ -15,10 +17,10 @@ export const ControlCenter: Widget.Window = new Widget.Window({
     canFocus: true,
     exclusivity: Astal.Exclusivity.NORMAL,
     anchor: Astal.WindowAnchor.TOP | Astal.WindowAnchor.RIGHT,
+    layer: Astal.Layer.OVERLAY,
     margin_top: 10,
     margin_right: 10,
     width_request: 450,
-    height_request: 400,
     monitor: 0,
     visible: false
 } as Widget.WindowProps, widgetsContainer);