Fix file actions including permanent shares

It's Sunday and I have been fixing IE8 shit for a customer themes all week ... so I had a look at this again. Some genius had the Idea of optimizing the CSS I added to make this work at least a little bit in IE8. Next time you do that I will add the following comment to the CSS:

/* You may think you know what the below CSS does. Trust me, you don't. And don't waste your time 'optimizing' it! Unless IE8 has somehow vanished from earth DON'T F*CKING TOUCH IT! */

Or now that I think on it I like this one even better:

/* If you 'optimize' the below CSS and it breaks in IE8 it means free beer for everyone at the next developer meeting. And you'll pay for it. */

Seriously though. I really think of adding the IE switch from https://github.com/owncloud/core/issues/308#issuecomment-13583610. At least the css will then clearly be marked when it does ie magic... any opinion?

All in all, this fixes #1779 again.

@MTGap @jancborchardt @DeepDiver1975 @tanghus @Raydiation @rperezb please review