browse link dialog (with new jstree)
comment out not working model lines
Merge branch '4.0' of github.com:impresspages/ImpressPages-CMS into 4.0
Merge branch '4.0' of github.com:impresspages/ImpressPages-CMS into 4.0
Merge branch 'browse_link_dialog' of https://github.com/greybyte/ImpressPages-CMS into 4.0