LB-1526: "Link" post type improvement

Add css changes
Merge pull request #130 from nidzix/master

LB-1526: "Link" post type improvement
LB-1541 Support version system for admin
Merge pull request #131 from vladnicoara/versioning

LB-1541 Support version system for admin
LB-1353: Undeleted post appear in posts list after 60s

Fixed error in javascript.
Added loading mechanism in core lib.
Merge pull request #132 from nistormihai/master

LB-1353: Undeleted post appear in posts list after 60s