Persist desktop notifications on/off preference

[phiter]

Feature Description

The application should persist desktop notifications on/off preference

Problem

In the app bar, there is a button which enables/disables desktop notifications. This preference is not being persisted and if you refresh the page it turns on again.

Expected behaviour

The desktop notification preference should be persisted across page refreshes/different tabs.

Additional comments

Dark/light theme switch does that already using localstorage, so I suppose adding a similar mechanism to the notifications switcher could be a good feature.