PierreSt's style sorting code in 2.6?

[Inge Wallin]

Piere Stirnweiss has done some very nice work on presenting the styles in the 
order with the used ones sorted first. This is now in master and it is one of 
the most asked-for features from real users. Or put another way: not having 
the used styles first is the misfeature that we have most complaints about.

Would it be ok to get this into 2.6?  We know already that we will need at 
least one more RC. There are also no new strings so that wouldn't hinder it.