Bugfix: Don’t focus the wrong workspace when moving to scratchpad (+test) (Thanks loblik)

The problem was that scratchpad_move() didn’t check whether the source
workspace was focused. Therefore, 'move scratchpad' only worked reliably
interactively , but not when used with criteria.

src/scratchpad.c

@@ -58,7 +58,8 @@ void scratchpad_move(Con *con) {
 
     /* 4: Fix focus. Normally, when moving a window to a different output, the
      * destination output gets focused. In this case, we don’t want that. */
-    con_focus(focus_next);
+    if (con_get_workspace(focus_next) == con_get_workspace(focused))
+        con_focus(focus_next);
 }
 
 /*