Sidebar closes after save and delete

[David Woodfall]

On (20/03/18 15:56), Dave Woodfall <dave at dawoodfall.net> put forth the proposition:
>On (20/03/18 07:46), Kevin J. McCarthy <kevin at 8t8.us> put forth the proposition:
>>On Tue, Mar 20, 2018 at 10:38:49AM +0000, David Woodfall wrote:
>>>I've noticed since I've been using the sidebar that it closes when
>>>deleting or saving a message in index and pager.
>>>
>>>I managed to fix the delete problem by changing the macro to:
>>>
>>>s=Trash<enter>":set sidebar_visible<enter>"
>>>
>>>But this doesn't work with <save-message> for some reason. It looks
>>>like something is closing it after my macro has finished.
>>
>>Check to see if you've bound something to <sidebar-toggle-visible> that
>>is inadvertently triggering.  My guess is something in one of your
>>macros is leaving that keybinding in the input buffer.
>>
>>-- 
>>Kevin J. McCarthy
>>GPG Fingerprint: 8975 A9B3 3AA3 7910 385C  5308 ADEF 7684 8031 6BDA
>
>I commented out all the source lines in my .muttrc for binds,
>sidebar, colours and pretty much everything. I haven't looked at the
>global rc yet though. I'll check that next.
>

The culprit turned out to be a message_hook which I had turn it off
when I opened a message. I'm not quite sure why that was activating
when deleting or saving a message though.