* Fix an exception with the notification counter
* Ensure the database is really loaded before a scan
* Inform the user when a scan is cancelled
* Allow quicker cancelling of scan (when in the middle of hashing)
* Don't block main thread when updating databases
* Change the fab color depending on the scan state
* Add a simple textual progress bar to scans
* Make text output selectable
* Add a test signature
* Small sanity checks