During trans3

I added window statements the window auto statement.
Showing the window is dependent on _preferences.during_trans If this is used.

If _preferences.during_trans is set to "window" and the window auto statement is used, the window is shown during transitions.
If _preferences.during_trans is set to "string" and the window auto statement is used, text is also shown during transitions.
If _preferences.during_trans is set to False and the window auto statement is used, it is the same that the window hide statement is used.

And the window is hidden automatically when the scene statement is used even if the window auto statement is used.