Background color for headers in comments section not consistant

[SergeyBiryukov]

As originally ​reported by Ipstenu on WordPress Trac:

The sortable columns 'Author' and 'In response to' are white instead of the nice grey on Chrome and Safari on XP.

As noted by wikichaves, this is caused by CSS rule in bp-xprofile/admin/css/admin.css:

th a {
	background: #fff;
	...
}

[djpaul]

(In [3591]) Only load xprofile admin CSS/JS on the xprofile admin pages. Fixes #2973

[djpaul]

(In [3804]) Only load xprofile admin CSS/JS on the xprofile admin pages. Fixes #2973 (branch)

[johnjamesjacoby]

Moving closed ticket out of Awaiting Review.