[bug] fail gracefully on connection initialization errors
There's some corner cases that were very badly captured. On the first place, it's confusing to quit on connection errors.
Secondly, a side-effect of aborting the initialization of the bitmask object was a semi-random segfault when trying to access the object.
Here I pass any connection errors to the gui, but leave to the user to quit the app. This probably will need more work when we want to terminate the app on unrecoverable errors (no polkit, etc...), but for now it makes the systray much more usable.
- Resolves: #465 (closed)