e client focus - fix focus if moving focused window to new desk

if the window being moved to a new desktop is focused, then ensure
after the move to restore focus to the last focused in the focus stack
for this desk to something stays focused.

@fix

src/bin/e_client.c

@@ -2805,6 +2805,7 @@ e_client_desk_set(E_Client *ec, E_Desk *desk)
 {
    E_Event_Client_Desk_Set *ev;
    E_Desk *old_desk;
+   Eina_Bool was_focused = ec->focused;
 
    E_OBJECT_CHECK(ec);
    E_OBJECT_TYPE_CHECK(ec, E_CLIENT_TYPE);
@@ -2872,6 +2873,11 @@ e_client_desk_set(E_Client *ec, E_Desk *desk)
              e_client_res_change_geometry_restore(ec);
              ec->pre_res_change.valid = 0;
           }
+        if (was_focused)
+          {
+             E_Client *ec_focus = e_desk_last_focused_focus(old_desk);
+             if (ec_focus) e_client_focus_set_with_pointer(ec_focus);
+          }
      }
 
    if (ec->stack.prev || ec->stack.next)