Squashed 'modules/base/owlcarousel/' changes from af7d687..57f76d2

57f76d2 Backport 2.x theme implementation method.
7d62b8c Issue #2333813 by bserem: Correct spelling on admin page

git-subtree-dir: modules/base/owlcarousel
git-subtree-split: 57f76d2079e5d4191dc9358a23e8c67164e0817d
Merge commit '16c2116a5467bb9cba34bc73c16b9e5011cd701d' into 7.x-1.x