Added:
- changePassword to change the password
NOTE: this requires the old password,
just to prevent account hijacking.
- some basic user limit information
- theme selector
NOTE: the system theme is meant to function like auto-theme,
and is directly translated into a flutter ThemeMode,
however, this does not appear to be working on the web.
This commit also adds the logout and delete account buttons,
but they do not yet delete all rooms,
nor do they properly logout the user.
BUG: User is not logged out correctly,
reloading the page fixes this.
Maybe localstore.listen does not detect deletion?
