/tmp/bitmask.lock is not removed
to reproduce:
- start bitmask for first time
- hit cancel on first page of wizard
- app quits but /tmp/bitmask.lock is not removed
(from redmine: created on 2014-07-02, closed on 2014-09-01)
to reproduce:
(from redmine: created on 2014-07-02, closed on 2014-09-01)