some window moving

modules/client_background/background.lua

@@ -12,6 +12,7 @@ end
 function Background.terminate()
   background:destroy()
   background = nil
+  Background = nil
 end
 
 function Background.hide()

modules/client_background/background.otmod

@@ -12,4 +12,3 @@ Module
 
   onUnload: |
     Background.terminate()
-

modules/client_background/background.otui

@@ -9,4 +9,3 @@ Panel
   anchors.bottom: parent.bottom
   margin-top: 1
   focusable: false
-