* Mark underline css as !important. It should override other css (such as the css...

* Mark underline css as !important. It should override other css (such as the css added in r91432) if the user specifically selected that option.
* Fix css flipping: for Simple, it still depended on the content language (however, no css actually needs flipping there). For Standard/CologneBlue, I re-added flipping even though it's not needed there either. Just in case css is added that does need flipping, so it is future-proof :). Consequently, I added noflip to the existing css.
* For this flipping I added a parameter to addInlineStyle(), which I assume to be useful in other cases as well