Progress support on notifications
See also: lipstick!77 (merged)
- Might be good idea to support updating old db to schema change. Now just using deletion because the mechanism existed :)
- New notification texts subject to change
- Could perhaps implement persistent property for notification interface and use that when transfer is ongoing. Now clicking such notification automatically removes it and new one appears a second later.
- Should also do something for notification removal. Getting rid of progress notification will get a new one like above.