Add line breaks to bookmarks if the name is too long
The dropdown now does stretch with long names, but we should also break the line once it reaches a certain size (as it is in katello-style bookmark dropdowns). Really long names make the dropdown overflow the page (see attached screenshot).
The bookmark picker's width is capped at a sensible width, line breaks are inserted into the names.
A follow-up on https://bugzilla.redhat.com/show_bug.cgi?id=1990790