Fix the goWorkspace method for bookshelve refactor

goWorkspace isn't used in gh-book, which is why this bug wasn't picked up until
now.
Avoid editor pile-up, clean up on closing of edit view.
Remove commented less import.

I asked @tmsp1 to comment this so I can check if it needs to be
moved elsewhere, or whether it can simply be removed. Turns out
the bootstrap variables are already included in styles/main.less
and also in every other product where this is re-used, so deleting it
is the right thing to do.
Merge remote-tracking branch 'origin/master' into assorted-fixes-episode01

Conflicts:
	scripts/views/workspace/content/aloha-edit.coffee
Merge pull request #5 from oerpub/assorted-fixes-episode01

Small fixes to get bookish working again as standalone