Resolve #2957030 "Allow media entity reference fields to be displayed as a gallery in a colorbox"
Resolves #2957030. Suggested commit message:
feat #2957030: Allow media entity reference fields to be displayed as a gallery in a colorbox
Authored-by: seanB
Authored-by: lukasz.tyc
Authored-by: jastraat
Authored-by: Grayle
Authored-by: samuhe
Authored-by: DYdave
Authored-by: dww (Derek Wright) <git@dwwright.net>