feat: add NotificationButton widget to bar to display notifications and work NotificationButton to a usable state

modules/wlogout/WLogout.qml

@@ -62,7 +62,7 @@ Variants {
 			MouseArea {
 				anchors.fill: parent
 				onClicked: {
-					console.log("clicked ???, closing Wallpaper Picker")
+					console.log("clicked Background, closing Wallpaper Picker")
 					wlogoutLoader.active = false
 				}
 				GridLayout {