Showing the number of messages returned from a search in the status bar would be
nice as well

Well this needs to go into the "folder name" bar, which is part of the shell,
right?

do we even care about this? I certainly don't but whatever...

assigning to peterw because he knows this code, but feel free to
assign back to evolution-mail-maintainers/future if we decide to not
do this or whatever.

I can get the number of selected messages fairly easily, I think. As
for the number of messages returned by a search, I don't know. I'll
look into it.

Giving the UI keyword.

The soon-to-be attached patched adds support for the selected count;
however, ETreeSelectionModel doesn't implement (*selected_count) so it
continually displays that there are 0 items selected.

I have filed bug 205353 on GAL to implement selected_count; this bug now
blocks on it.

Created attachment 40034 [details] [review]
Patch to display selection counts

Ok, the patch is ready to go in, except I caused bug 206795 fairly
easily, so I don't want to commit just yet.

Created attachment 40121 [details] [review]
Updated patch (ChangeLog, won't display if < 2 messages selected)

Checked in.