themes kitten: When using the Default theme as an auto switch theme include all the actual settings values

Fixes #8124

kittens/themes/ui.go

@@ -525,7 +525,11 @@ func (self *handler) on_accepting_key_event(ev *loop.KeyEvent) error {
 
 	scheme := func(name string) error {
 		ev.Handled = true
-		self.themes_list.CurrentTheme().SaveInFile(utils.ConfigDir(), name)
+		{
+			theme := self.themes_list.CurrentTheme()
+			theme.GenerateDefaultSettings()
+			theme.SaveInFile(utils.ConfigDir(), name)
+		}
 		self.update_recent()
 		self.lp.Quit(0)
 		return nil