[[ Bug 14233 ]] [[Player]] should not retain previously open movie when invalid path used
[[ Bug 14233 ]] Added comments and bugfix note
Merge remote-tracking branch 'upstream/develop-6.7' into bugfix-14233

Conflicts:
	engine/src/mac-qt-player.mm
Merge pull request #1614 from runrevpanos/bugfix-14233

Bugfix 14233