* We shouldn't use "Search" when we mean "Filter". Filter is correct
here, since we are just showing a subset of what's otherwise shown,
and won't find anything that's older (or whatever).
* The stream/topic wording was unnecessary; the things we're filtering
are topics (E.g. "Filter users" might look at name/email, and is the
right label, not "Filter name/email").
We change the text. This is an attempt to make the text space occupied by
the col header of last message timestamp smaller so that
it doesn't overflow to next line in some languages.
Also, add some extra padding.
We remove the action column and show action buttons next to topic
after unread count (if present). This save us a lot of extra space
on small window sizes.
We store the relevant data to hide/show a topic in the row itself,
and use jquery to hide/show it on filter change.
This also fixes search breaking the set filters.
* Add action to mute topics.
* We don't need to store muted data per topic as previously planned.
* Moved launch topic test to the top so that they run on non-modified
data.
* Show an empty overlay of recent topics.
* Register click event to open recent topics.
* Launch recent topics on "t" keypress.
This is based on the draft overlay.