CS
Fixed missing angle bracket in MediaManager
Do not allow to add the same image to fallback and language record
Remove images from language if removed in fallback (#465)
Hide language option if there is just one language in the page tree
Added new attributes option to fetch fallback data

When field -> attributes -> fetch_fallback equals true, the query
statement for fetching a product will include the fallback languages
in "field_fallback" result set.
Merge media data from fallback language (#465)