These mock objects did not buy any ease in testing, as
evident from the fact that this commit hardly contains
any changes to the tests themselves.
This commit also removes some unnecessary `filter: undefined`,
parameters sent to MessageList constructor.
We move compose from being a part of message feed to
being a part of middle column which is a common parent of recent
topics and message feed. This allows us to use a common compose
box for both the views. Fortunately, compose actions were
independent of this change so there weren't any evident
side effects.
Fixes#17543
The 'reply' button shows the stream>topic or recipient(s) of the
selected message, for better UX. It also expands to fill the
remaining horizontal space in the button bar -- this should help make
it easier for new users to figure out how to reply.
Finally, it uses "Message" instead of "Reply", to better match the
compose box.
Fixes#17940.
Abhijeet Prasad Bodas
Aman Agrawal
Ken Clary