[Device Notifier] Restore busy indicator
Summary:
This patch fixes two issues:
- the 'state' of the device now propagates correctly, that makes the busy indicator be displayed again, device emblems are also updated correctly
- there is no more delay between the moment when the device is actually mounted and the moment the device notifier says it is. The worst case used to be 5 seconds.
BUG: 354321
BUG: 399986
Reviewers: Plasma, VDG, broulik, bruns, ngraham, davidedmundson
Reviewed By: Plasma, VDG, ngraham, davidedmundson
Subscribers: mart, cfeck, ngraham, plasma-devel
Tags: Plasma
Differential Revision: https://phabricator.kde.org/D16170