expose UIA style identifiers

[stevefaulkner]

https://msdn.microsoft.com/en-us/library/windows/desktop/hh437309%28v=vs.85%29.aspx

see also related mapping bug https://www.w3.org/Bugs/Public/show_bug.cgi?id=29032#c0

[patrickhlauke]

I see a "Style" bit under the UIA listing of properties (right at the end), but have not been able to get anything to show up there...is this what this is concerning? And when would you see values in there?