Bug #8099 - Always restore to correct display value based on element's expected default display

[rwaldron]

Prior to cehcking the default display, disable the document's stylesheets to ensure an untampered read.

[jitter]

I feel kinda uneasy about this patch. It still won't work when people have inline styles on the body. And in the light of bugs like http://jqbug.com/8239 I would almost bet that there are browsers / platforms out there where disabling/enabling the stylesheets will cause major reflows and FOUC

[rwaldron]

jitter, i tested this pretty heavily in even the worst/slowest UAs and experienced no FOUC. I additionally tested it on a low end machine running IE6/7 as well - with consistent results. I'm open to further discussion though, as it is certainly unorthodox.