#377 Strange animation on transition to landscape mode

[Christa Runge]

svn 3139: The following issue was seen on a device with iOS-7:
Scenario:
- application setting: on Rotation rotate screen.
- press the button and start Test / Drill mode.
- see the first question as expected.
- press a button and see the answer as expected.
- turn the device to landscape mode.
Expected behavior:
- see an animated transition from portrait to landscape view.
Observed behavior:
- the card flips (but the backside still shows the answer).
Note: a similar behavior can be seen with any question except the very first question.

[Mathias Kussinger]

fixed with svn3140, did forget to disable flipping before rotation