Fixed getSemantics in h5peditor so we can save h5p-nodes again. (h5p core changed to not return string anymore.)
Fixed validation check to comply with php-doc "Use the === operator for testing the return value of this function.", to avoid strange bugs.
Started update of A/V widget to support embed code.

Added min. support to list widget.
Added update hook that sets an index on filepath in files.

Fixed semi-fullscreen.
Fixed semantics rewrite in h5peditor.

BUGFIX: Use H5PInterface getLibrarySemantics in Editor storage too, so editor also gets modifications.