Reviews should not have sticky options

[Clorith]

Currently individual reviews are just normal theme/plugin topics with stars above them, this means normal topic administration options such as making threads a sticky are included.

If you sticky a review it will instead show up in the support section (and be stuck to the top as expected of a sticky).

We should probably remove this option (I believe it's the only non-essential administrative task on a review)

[SergeyBiryukov]

ticket:2012:meta-2012.patch​ introduces a wporg_support_is_single_review() function that could be used here.

[netweb]

Replying to SergeyBiryukov:

ticket:2012:meta-2012.patch​ introduces a wporg_support_is_single_review() function that could be used here.

Added wporg_support_is_single_review() in [4126]

[coffee2code]

In 4161:

Forums Theme: Remove 'Stick' admin link for reviews.

Props SergeyBiryukov for initial patch.
Fixes #2055.

[SergeyBiryukov]

In 5360:

Support Forums: Simplify a condition in Stickies_Compat::admin_links().

See #2055.