User blog comment:Kirkburn/Technical Update: October 1, 2013/@comment-452-20131003025422/@comment-126761-20131003164410

Ah, adding classes manually was never an intended method of using the popout tool - it was only ever meant for automatic detection of wide tables. I do now understand better why you feel it is a removed feature as opposed to simply a changed one.

(Just as a personal thought for that particular table, you could put the description on its own row, and rowspan=2 the weapon cells)