Clear red warnings from WAVE report

[DJPaul]

​http://wave.webaim.org/

WAVE is a free web accessibility evaluation tool provided by WebAIM. It is used to aid humans in the web accessibility evaluation process. Rather than providing a complex technical report, WAVE shows the original web page with embedded icons and indicators that reveal the accessibility of that page.

If we get time, clear at least the red warnings from BP-Default. Obvious ones are missing form labels, etc.

(In [4452]) Add labels to 'order by' select boxes. See #3264

(In [4454]) Add label to activity stream filters; rename those items to fit labels. See #3264

(In [4455]) Add label to header search form. Fixes #3264

Cool that's one less moan.. I mean ticket I have to open, becomes tedious adding elements such as 'labels' which ought to have been there in first place.

Glad Waive was useful, tools where accessibility are concerned only go so far though it's a human evaluation chiefly.

One's been missed: http://buddypress.org/community/groups/bp-default/forum/topic/default-theme-great-job-with-accessibility/

(In [4969]) Move unused deprecated function to the graveyard. See #3264.

The only error I can see on testbp.org with the WAVE checker is in WordPress' admin bar. I found a deprecated function, so I moved that.