Tiling: Allow changing tiling mode through key-binding from all desktops.

Without this it is impossible to change the tiling mode using the key binding
but you can still change it using the gadget which is stupid.

src/modules/tiling/e_mod_tiling.c

@@ -827,15 +827,6 @@ static void
 _e_mod_action_toggle_split_mode(E_Object *obj EINA_UNUSED,
                                 const char *params EINA_UNUSED)
 {
-   E_Desk *desk;
-
-   desk = get_current_desk();
-   if (!desk)
-     return;
-
-   if (!desk_should_tile_check(desk))
-     return;
-
    _tiling_split_type_next();
 }