Moved AccountMeta provider into <User> context
and migrated to using a FutureProvider to perform the network request
NOTE: Bug was caused by AccountMeta? being loaded late,
causing the root provider to be reloaded.
Translations are provided in *.arb* format.
Some keys have descriptions
(indicated by leading @-symbol).
Descriptions should not be copied into the translation itself.
Currently only English is supported (app_en.arb),
but German is planned.
Apparently weblate merged .arb support at some time,
so it would be nice to enable community translations at some point.
Every page (after login) has access
to the User object via context.read/watch<User>().
This reduces localstore and asnyc operations,
as the screens do not have to load the user every time.
Additionally this prevents anyone from
using the without a user object.
The screen allows every room member,
to view a list of other room members,
and their role (Owner, Admin or Member).
If the user is allowed
(Owner, Admin, changeAdmin/manageMembers),
to either kick or promote members to the admin role,
the list tile will have a tap event.
NOTE: This is why some members do not have a hover animation.
For example the owner cannot be kicked.
and rewrote the component's network requests.
showSimpleSnackbar, allows displaying a simple snackbar,
with text and one action button, that can be clicked.
doNetworkRequest is supposed to be a wrapper for the
already existing post* functions.
It aims to make network requests and error handling easier,
by containing all the try&catch blocks
and being able to show snackbars.
