When attaching window make its parent tab active

kitty/boss.py

@@ -1139,6 +1139,7 @@ class Boss:
         if overlaid_window:
             target_tab.attach_window(overlaid_window)
         self._cleanup_tab_after_window_removal(src_tab)
+        target_tab.make_active()
 
     def detach_window(self, *args):
         if not args:

kitty/tabs.py

@@ -417,6 +417,11 @@ class Tab:  # {{{
 
     def __repr__(self):
         return 'Tab(title={}, id={})'.format(self.name or self.title, hex(id(self)))
+
+    def make_active(self):
+        tm = self.tab_manager_ref()
+        if tm is not None:
+            tm.set_active_tab(self)
 # }}}