added safety check in browserService.setItemPlayer to prevent 'Cannot read property 'parent' of undefined' error
Display only relevant records on session's browser item. Fixes #1818
change to previous. Fixes #1818
Tweak text around supported file formats
Fix html view syntax from previous
Show excerpts play icon on all videos rather than slotted assets
Add some more registration placeholders

For clearer guidance
Merge branch 'production'

Conflicts:
	app/assets/service/browserService.js
	app/assets/templates/form/volumeEditMaterialsForm.html
	app/assets/templates/view/helpFormatsView.html
	app/assets/templates/view/registerView.html
	app/views/asset/formats.scala.html
	conf/messages