Implement do not disturb mode, more history work, cleanup

- Add basic do not disturb mode
  Can set a time until it enabled, persisted across reboots
  Whitelist for apps missing right not
  Inhibition API not wired up yet
- d-pointer JobDetails
- Use KFilePlacesModel for prettier destUrl reporting "Copying to Home"
- Expose default action in history as button
- Improved right-to-left language support
- Let NotificationServer just lurk (without registering a service)
- Catch when plasmoid is deleted and stick to another one