This removes the bookmark description UI, but leaves the backend in-place for a release or two, so that users have time to save anything they want (e.g. via backup).
The backend will be removed in bug 1402890.
MozReview-Commit-ID: La4AYFar7eK
Move the main contents of editBookmarkOverlay.xul into an include file and
inline the DTD and CSS files where used. Convert several chrome tests to
browser tests since the preprocessor is hard to use within the testing
framework.
MozReview-Commit-ID: DpPBOpZSuBN
