[Owncloud] usenames containing "@" and sharing

[Michael Gapczynski]

> By the way, the dropdown menu for sharing is rather small. I would
> appreciate it, if the width in css/sharing.css would be 32em, so long
> usernames sharing files with groups would still remain readable.

Sorry Holger, I missed this at the end of your email. I'll make a note of it, 
but I'm not sure if increasing the width is the best solution for long names. 

Also, next time create a patch in git. It will make it easier for both you and 
me. 


Michael