* On Forums landing page, show who was the most recent commenter on each
board's most recently updated post.
* Show photo count on Profile Pages on the "Photos" tab.
* Revise the mobile and tablet top nav bar:
* Always show small badge icons linking to the Site Gallery & Forum
* Always show Friends & Messages badges. If no new notifications, they
display as grey instead of yellow w/ a number.
* Put icons next to most nav bar items, especially the User Menu
* Tighten the sprawling page layouts in the Forums to be more compact
for mobile screens.
* Fix bug where some pages scrolled horizontally on mobile: the root cause
was divs with class="content p-2", needs minimum p-3 (but p-4 is used) to
provide enough padding to overcome column margins which were pushing the
page too wide on mobile.
* Add photo upload quotas.
* Non-certified users can upload few photos; certified users more
* Fix foreign key issues around deleting user profile photos for psql
