double-click on a region will now toggle the marked status

world_regions_widget/region_label.py

@@ -195,7 +195,8 @@ class RegionLabel(QLabel):
         super().mousePressEvent(event)
 
     def mouseDoubleClickEvent(self, event):
-        self.region_label_helper.change_region_label_toggle_marked_signal.emit(self)
+        if self.is_region:
+            self.region_label_helper.change_region_label_toggle_marked_signal.emit(self)
         super().mouseDoubleClickEvent(event)
 
     def enterEvent(self, event) -> None: