Use `Topic Tag` term for singular topic tag context in 'at a glance' dashboard metabox. Fixes #2544

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5464 9866e705-20ec-0310-96e7-cbb4277adcfb
In `bbp_do_ajax()` use `get_option( 'html_type' )`.

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5465 9866e705-20ec-0310-96e7-cbb4277adcfb
Simpify `ABSPATH` checks to pass coding standard sniffers that look for brackets on comparisons.

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5466 9866e705-20ec-0310-96e7-cbb4277adcfb
Only add the `s` argument to queries if `rs` or `ts` are set in their respective topics & replies queries.

See #2607, #WP11330, [WP28623] [WP28612], [WP28804].

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5467 9866e705-20ec-0310-96e7-cbb4277adcfb
Merge branch 'master' of git://bbpress.git.wordpress.org into bump_functions