(only for user, server and theme)
This was done, because localstore is somewhat inconsistent
in terms of events on different platforms.
Also storing user, server and theme using shared-preferences
should fit into flutters ecosystem a little better
This is prevents the current route from being reset,
when reloading the tab
and also prevents the welcome screen from showing
(when running on slow connections)
NOTE: This also means that the home screen will be loaded
even if the client has never been logged in.
This means that some functions might return null
