add missing features/fixes to changelog for 1.5
add missing features/fixes to changelog for 1.5

superdesk/web-publisher,takeit/web-renderer,takeit/web-renderer,takeit/web-renderer,takeit/web-publisher,superdesk/web-publisher,superdesk/web-publisher,takeit/web-renderer,takeit/web-publisher,takeit/web-publisher,superdesk/web-publisher