MouseHoverEventTestCase: Dispatching event on_cursor_leave to cleanup some tests (#7494)
MouseHoverEventTestCase: Dispatching event on_cursor_leave to cleanup some tests (#7494)

* MouseHoverEventTestCase: Dispatching event on_cursor_leave to cleanup some tests.

* MouseHoverEventTestCase: Disable on_window_flip method.
matham/kivy,rnixx/kivy,kivy/kivy,rnixx/kivy,matham/kivy,kivy/kivy,rnixx/kivy,akshayaurora/kivy,akshayaurora/kivy,matham/kivy,matham/kivy,kivy/kivy,akshayaurora/kivy