Now when the user opens a narrow that has a draft saved for
that particular conversation, the draft will automatically
be restored in the compose box. This will make it easy to
return to a draft after clicking away, and also will make
it less confusing when people close the compose box by
accident. Note that this only restores the draft when
there is a full recipient specified (stream and topic,
or at least one PM recipient).
Fixes part of #18555.
Fixes#11218 and #17396.
The blocks were originally separated by some code for seemingly no
reason, so now the 2nd block is brought up and combined into the first.
An old irrelevant comment is also removed.
When a long message is restored from a draft (or scheduled messages),
its end, and the cursor placed there, used to be out of view, giving the
impression that the message was not focused, when it actually was.
This is fixed by always scrolling the cursor into view.
