Apply undo/redo to border drawing

src/editor.cpp

@@ -48,6 +48,8 @@ void Editor::undo() {
         map->undo();
         map_item->draw();
         collision_item->draw();
+        selected_border_metatiles_item->draw();
+        displayMapBorder();
     }
 }
 
@@ -56,6 +58,8 @@ void Editor::redo() {
         map->redo();
         map_item->draw();
         collision_item->draw();
+        selected_border_metatiles_item->draw();
+        displayMapBorder();
     }
 }
 

src/ui/bordermetatilespixmapitem.cpp

@@ -42,5 +42,6 @@ void BorderMetatilesPixmapItem::draw() {
     }
 
     painter.end();
+    map->commit();
     this->setPixmap(QPixmap::fromImage(image));
 }