GTNPORTAL-2747: improve mobile skin compatiblity with other webui components.
GTNPORTAL-2854 Fix packaging for Redirect Admin UI
GTNPORTAL-2855: add portal property to specify the viewport to use for a site. Remove viewport hack from the responsive header portlet and move it to the portal property for the mobile site.
GTNPORTAL-2852 Clean up and improve bundle loading process