We're overriding the default with null often enough that we should
just change the default.
Consequently, no more phantom blank conversations with oneself should
appear after receiving a group update. They were being added to the
inbox because they were incorrectly initialized with an active_at value.
Fixes#281
In lieu of a click event, the change event was being fired when clicking
out of the search input. The input event seems to be what we actually want.
Fixes#273
