pl_PL properties of UI added
Polish translations
Polish translations
Merge branch 'master' of github.com:kasiulek91/3akai-ux into polish

Conflicts:
	node_modules/oae-core/deleteresources/manifest.json
	node_modules/oae-core/topnavigation/manifest.json
Polish translation follow-up fixes
Update documentation
Fixed bug where successfully deleting multiple content items/discussions wouldn't have notification title
Removing unused keys