Now view used for sending and receiving messages during the call (ChatView)
is the same as for regular ConversationView.
Also this commit fix two problems:
1)remove black imprints of text views, that appeared after window resizing
2)set status "read" for messages arriving during call, so they don't appear
in SmartList as unread.

Change-Id: I6d0cb79878395d28cfc93491a9d4cab42ed89192
Reviewed-by: Anthony Léonard <anthony.leonard@savoirfairelinux.com>