Updates will be observed from site component
(Makes pure projectors ignore updates, unless the user navigates manually)
Updates can now be delayed using the "noInterruption" route data.
If the "noInterruption" route data was set, updates notifications
will not be shown in this view.
The update notification will appear, after the user navigates
to a view without "noInterruption" flag.
Introdcues a new update service.
Listens to service-worker updates and shows a snack-bar to inform about updates.
Provides a function to manually check for updates.
The service worker tries to be consistent in it's own version and
updates in the background.
Some manuall trigger will be required to update, which is either a
reload or the execution of the provded check function
with help from
@FinnStutzenstein
