Now that the editor fires editing_finished on every write, the unit
tests had to be updated.
- Add qtbot to the editor fixture to resolve `QtWarningMsg:
QSocketNotifier: Can only be used with threads started with QThread`
- Use removePaths instead of disconnect to stop the watcher from
signalling. This avoids an error when the editor is forcibly cleaned
up by the tests without the signal ever being connected, but otherwise
has the same behavior as disconnecting the singal.
- wait for a signal on write instead of proc closed
- wait for _watcher.fileChanged in test_unreadable to ensure the write
event is fired before the test exits.
23eb6a6c53