Fix TileMap editor so that pressing control deselects cells correctly

(cherry picked from commit 83f1e31483cb2ae52d5d3f4490a6cb08dab64d9c)

editor/plugins/tiles/tile_map_editor.cpp

@@ -631,7 +631,7 @@ bool TileMapEditorTilesPlugin::forward_canvas_gui_input(const Ref<InputEvent> &p
 					}
 				} else if (tool_buttons_group->get_pressed_button() == select_tool_button) {
 					drag_start_mouse_pos = mpos;
-					if (tile_map_selection.has(tile_map->local_to_map(drag_start_mouse_pos)) && !mb->is_shift_pressed()) {
+					if (tile_map_selection.has(tile_map->local_to_map(drag_start_mouse_pos)) && !mb->is_shift_pressed() && !mb->is_command_or_control_pressed()) {
 						// Move the selection
 						_update_selection_pattern_from_tilemap_selection(); // Make sure the pattern is up to date before moving.
 						drag_type = DRAG_TYPE_MOVE;