CaScadeS only
fixing bustage in NS7 and Moz<trunk because dependency to editorShell was removed
fixing horked "Choose file buttons" in NS7 and Moz<trunk because of recent changes in nsIIOService
CaScadeS only
- never rebuild the list of stylesheets from scratch
- fix bug in line-height support
- support for -moz-opacity
- fixes buggy @import support
- workaround for async stylesheet loading
adds support for line-height property, fixes a blocking bug in length units menulists, fixes a bug in Border Tab when trying to unspecify the border style and all four side borders have the same styles