Split out a generic MessageInfoBar
This was originally part of !113 (merged), but we'll use a simpler info bar now.
There are plans for another info bar for room errors though (see !88 (merged)), so this is still a useful change.
This was originally part of !113 (merged), but we'll use a simpler info bar now.
There are plans for another info bar for room errors though (see !88 (merged)), so this is still a useful change.