Fix drawing the offmap area for small resolutions.

The problem was a bit tricky. A partial resolution removed an element with
an empty id. The main_map_border section has no id and thus an empty id.
So the inheritance removed this section by accident. Of course the id for
a removal or change should be mandatory, which the next patch will do.

This fixes a part of bug #21584.

changelog

@@ -11,6 +11,8 @@ Version 1.11.9+dev:
        31,11 at the end of The Bay of Pearls, causing it to disappear
        forever.
      * S15 (The Lost General): fix bug of sighted events firing too early
+ * Editor:
+  * Fixed: Drawing the offmap area for small resolutions.
  * GUI2
    * Added: FAI-function handling in GUI2 widgets.
    * Added: A new tooltip window.

data/themes/editor.cfg

@@ -1516,13 +1516,13 @@
         [remove]
             id=top_button_file3
         [/remove]
-        [remove]
+        #[remove]
             #id=villages-panel
             # image=themes/status-bg.png
             # rect="+5,=+1,+71,+19"
             # xanchor=fixed
             # yanchor=fixed
-        [/remove]
+        #[/remove]
         [remove]
             id=villages-icon
             # icon=themes/villages.png