Attributes and CSS in XUL

[bzbarsky]

I was just looking at the XUL source a bit, and it looks like attributes 
in XUL override anything set in the style system.  So instead of being 
considered at the level of presentational hints (as HTML attributes 
are), they override everything (including user !important rules, UA 
!important rules, etc).

Is this on purpose?  Do we want it to remain that way?

-Boris