Exiting liveview with Alt-F4 causes OpenLP to become unstable

[Arjan Schrijver]

When I exit the liveview (on single screen) with Alt-F4, OpenLP becomes unstable. I got a Segmentation Fault once, and now I got the crash dialog with the following stacktrace when I click 'Next slide':

Traceback (most recent call last):
  File "/home/arjan/prive/openlp/openlp/core/ui/slidecontroller.py", line 1036, in onSlideSelectedNextAction
    self.onSlideSelectedNext()
  File "/home/arjan/prive/openlp/openlp/core/ui/slidecontroller.py", line 1063, in onSlideSelectedNext
    self.slideSelected()
  File "/home/arjan/prive/openlp/openlp/core/ui/slidecontroller.py", line 986, in slideSelected
    self.display.text(to_display)
  File "/home/arjan/prive/openlp/openlp/core/ui/maindisplay.py", line 244, in text
    self.setGeometry(self.screen[u'size'])
RuntimeError: wrapped C/C++ object of %S has been deleted

Hardware: single screen laptop
Operating System: Gentoo Linux stable amd64
Version of OpenLP: current trunk

Steps to reproduce:
1. Add song to Service
2. Doubleclick the song in the service to activate liveview
3. Close liveview with Alt-F4
4. Click 'Next slide' in live panel, or try to show a new item on the liveview, or try to exit the program

[Arjan Schrijver (arjan-s)]

Note: this also affects 2.0.1

[Jonathan Corwin (j-corwin)]

What does Alt-F4 do under Linux?

'Esc' should be the keystroke for closing the live view. If Alt-F4 is anything like Windows, it should close the whole app, not just blindly kill a single window.

[Tim Bentley (trb143)]

Alt-F4 is bound to Exit!

[Tim Bentley (trb143)]

Unable to reproduce in 2.0.2!