This module extracts these two functions that get called by
several other modules:
start()
cancel()
It is a little bit arbitrary which functions got pulled over
with them, but it's generally functions that would have only
been called via start/cancel.
There are two goals for splitting out this code. The first
goal is simply to make `compose.js` have fewer responsibilities.
The second goal is to help break up circular dependencies.
The extraction of this module does more to clarify
dependencies than actually break them. The methods start()
and cancel() had actually been shimmed in an earlier commit,
and now they no longer have a shim.
Besides start/cancel, most of the functions here are only
exported to facilitate test stubbing. An exception is
decorate_stream_bar(), which is currently called from
ui_init.js. We probably should move the "blur" handler out
of there, but cleaning up ui_init.js is a project for another
day.
It may seem slightly odd that this commit doesn't pull over
finish() into this module, but finish() would bring in the
whole send-message codepath. You can think of it like this:
* compose_actions basically just populates the compose box
* compose.finish() makes the compose box do its real job,
which is to send a message
This moves the implementations of error/report/message from
ui.js to ui_report.js. They had been shimmed before, so calling
modules still use the same names to call the functions, but we
no longer need the shims.
