Search subtitles are handled inconsistently across admin

[kawauso]

Try the following strings in the Comments admin screen and any other:

\'"\fs"\\\"

imareallylongstringlookatmegoandgoandgoandgoandgoandgoandgoandgoandgoandgoandgoandgoandgoandgo

The Comments screen uses strip_slashes() and wp_html_excerpt() to limit search strings to 50 characters, while other screens do not.

[jakub.tyrcha]

All we need is wp_strip_all_tags (well I'm not sure if we need even this one, but the excerpt is certainly not needed). Besides, only the display is stripped - not the search string itself (tested).

[lukecavanagh]

Patch Refreshed