[PATCH][RESEND] Tasklist: Fix drag&drop in the deskbar mode

[Hudd]

When sorting order is set to Drag&Drop in the deskbar mode, tasklist
plugin uses the x coordinate to determine where to put dragged buttons.
This behaviour is counter-intuitive.

I suspect, it was forgotten to be updated when the deskbar mode was
added.

Add check for deskbar mode in xfce_tasklist_button_drag_data_received,
and use the y coordinate in such case.


This is the same patch I've sent few days earlier, with clearer
description.
---
diff --git a/plugins/tasklist/tasklist-widget.c b/plugins/tasklist/tasklist-widget.c
index d596813..0482d7d 100644
--- a/plugins/tasklist/tasklist-widget.c
+++ b/plugins/tasklist/tasklist-widget.c
@@ -3071,8 +3071,9 @@ xfce_tasklist_button_drag_data_received (GtkWidget         *button,
   sibling = g_list_find (tasklist->windows, child2);
   panel_return_if_fail (sibling != NULL);
 
-  if ((!xfce_tasklist_vertical (tasklist) && x >= button->allocation.width / 2)
-      || (xfce_tasklist_vertical (tasklist) && y >= button->allocation.height / 2))
+  if ((xfce_tasklist_horizontal (tasklist) && x >= button->allocation.width / 2)
+      || ((xfce_tasklist_vertical (tasklist) || xfce_tasklist_deskbar (tasklist))
+          && y >= button->allocation.height / 2))
     sibling = g_list_next (sibling);
 
   xid = *((gulong *) gtk_selection_data_get_data (selection_data));