Allow regular (non-admin) users access to the Manage Forums page so they can
create and manage their own forums.
Things that were already working:
* The admin forum page was already anticipating regular LoginRequired credential
* Users only see their owned forums, while admins can see and manage ALL forums
Improvements made to the Forum Admin page:
* Change the title color from admin-red to user-blue.
* Add ability to search (filter) and sort the forums.
Other changes:
* Turn the Forum tab bar into a reusable component.
* 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.
Adds initial code for basically functional forums:
* Forums landing page shows hard-coded list of Categories along with any
forums in the DB that use those categories.
* Admin: Create, Edit forums and view forums you own or have admin rights
to modify.
* Landing page forums list shows the title/description and dynamic count of
number of Topics and total number of Posts in each forum. TODO: distinct
count of Users who posted in each forum.
* Board Index page shows list of Threads (posts) with a Replies count and
Views count on each thread.
* Thread view is basically an array of Comments. Users can post, edit and
delete (their own) comments. Deleting the first comment removes the
entire Thread - the thread points to a first Comment to provide its body.
* Reply and Quote-Reply options working.
