PLF-5605 The property publication:liveRevision should never be empty

Conflicts:

	samples/acme-website/webapp/src/main/webapp/WEB-INF/conf/acme-portal/wcm/artifacts/site-resources/acme/StylesheetBlue.xml
UI-3233 [PLF] Alignment Bugs on some screens
Merge commit '65d4122b01d9f28f9313d34dc5e8834937d965fd' into HEAD