Adds a UserView that contains a MainSplit with an empty div
and a RightPanel, preset to the given member.
UserView fetches the profile and creates a fake member, which
it passed on to the RightPanel.
this doesn't use the view_user action on purpose, to avoid any
interference of the UserView when trying to view a room member.
With this more of the
controls that look like buttons can be operated via the keyboard and
navigated to by screen reader users. This includes editor buttons such
as File upload, Audio / Video call, Right pannel hide button, Jump to
the bottom timeline button, and some more buttons found in the user
settings.
Also I have added alt texts to some images that in turn label buttons
which these happen to be packed in and removed some untranslated alt
texts from decorative non-actionable images that might add more
verbosity when talking about screen reader user experience.
Take a step closer to a flux-like architecture for group data, for
the purposes of providing features that require it.
Now the app has a single GroupStore that can be poked to fetch
updates for a particular group.
