Opt: Add load_offset method to Button class

It will be useful in the future

module/base/button.py

@@ -88,6 +88,16 @@ class Button:
         self.image = np.array(image.crop(self.area))
         return self.color
 
+    def load_offset(self, button):
+        """
+        Load offset from another button.
+
+        Args:
+            button (Button):
+        """
+        offset = np.subtract(button.button, button._button)[:2]
+        self._button_offset = area_offset(self._button, offset=offset)
+
     def ensure_template(self):
         """
         Load asset image.

module/os/globe_operation.py

@@ -18,13 +18,12 @@ class GlobeOperation(MapEventHandler):
         Returns:
             Button:
         """
-        for button in ZONE_TYPES:
-            if self.appear(button, offset=(20, 20)):
-                offset = np.subtract(button.button, button._button)[:2]
-                for change in ASSETS_PINNED_ZONE:
-                    change._button_offset = area_offset(change._button, offset=offset)
+        for zone in ZONE_TYPES:
+            if self.appear(zone, offset=(20, 20)):
+                for button in ASSETS_PINNED_ZONE:
+                    button.load_offset(zone)
 
-                return button
+                return zone
 
         return None