set taskbar button tool tips based on app language

backend/windows/taskbar_buttons_unsupported.go

@@ -13,6 +13,10 @@ func InitializeTaskbarButtons(hwnd uintptr, callback func(TaskbarButton)) error
 	return err
 }
 
+func SetTaskbarButtonToolTips(prev, next, play, pause string) error {
+	return err
+}
+
 func InitializeTaskbarIcons(prev, next, play, pause image.Image) error {
 	return err
 }