When a user marks that another photo should have been marked as explicit:
* The owner of that photo gets a notification about it, which reminds them of
the explicit photo policy.
* The photo's "Flagged" boolean is set (along with the Explicit boolean)
* The 'Edit' page on a Flagged photo shows a red banner above the Explicit
option, explaining that it was flagged. The checkbox text is crossed-out,
with a "no" cursor and title text over - but can still be unchecked.
If the user removes the Explicit flag on a flagged photo and saves it:
* An admin report is generated to notify to take a look too.
* The Explicit flag is cleared as normal
* The Flagged boolean is also cleared on this photo: if they set it back to
Explicit again themselves, the red banner won't appear and it won't notify
again - unless a community member flagged it again!
Also makes some improvements to the admin page:
* On photo reports: show a blurred-out (clickable to reveal) photo on feedback
items about photos.
* Enhance user experience replying to a forum thread. An inline reply textarea
is added to page footers, "Quote" buttons on posts will quote the markdown
source and focus the reply textarea, and "Reply" buttons will put an
"@ mention" and focus the reply textarea. Users with scripts disabled will
still be sent to the regular reply page as before.
* Improve all pagers by adding a "QueryPlus" template function that merges the
page number with other current query parameters.
* Fix private profile picture avatars not displaying in your Notifications for
profile pics you're allowed to see.
* Add the Contact page where users can contact the site admins for feedback or
to report a problematic user, photo or message.
* Reports go into the admin Feedback table.
* Admin nav bar indicates number of unread feedbacks.
* Add "Report" button to profile pages, photo cards, and the top of Direct
Message threads.
Misc changes:
* Send emails out asynchronously for more responsive page loads.
