fix focus passing when moving a column to another desktop

src/lib/layout/Window.ts

@@ -61,6 +61,10 @@ class Window {
 
     public focus() {
         this.client.focus();
+        if (!this.isFocused()) {
+            // in some situations focus assignment just doesn't work, let's do it later
+            this.column.grid.focusPasser.request(this);
+        }
     }
 
     public isFocused() {