New room header

[farooqkz]

I think a new Header component for Rooms is required. My idea:

+-----------------+
+ L title         +
+ text            +
+-----------------+

L is the room avatar and title is the name of room. text is number of members when no one is typing and the Farooq is typing... prompt when Farooq is typing. If there are more than 2-3 typing, a Many are typing... prompt will be shown.

@strukturart @Simon-Laux thoughts?

Edit: Also text has a smaller font size.

[Simon-Laux]

nice to have, but not necessary for the first milestone I'd say