XNAT-4261, XNAT-4286 (partial)

src/main/webapp/WEB-INF/tags/page/xnat.tag

src/main/webapp/page/blank/content.jsp

src/main/webapp/page/blank/index.jsp

src/main/webapp/scripts/xnat/app/timeout.js

src/main/webapp/scripts/xnat/app/topnav-browse.js

src/main/webapp/scripts/xnat/ui/topnav-browse.js

src/main/webapp/xdat-templates/layouts/Noninteractive.vm

src/main/webapp/xdat-templates/layouts/Popup.vm

...in/webapp/xdat-templates/navigations/NoninteractiveTop.vm

src/main/webapp/xdat-templates/navigations/powered_by.vm

src/main/webapp/xnat-templates/navigations/DefaultTop.vm

src/main/webapp/xnat-templates/screens/AdminSummary.vm

src/main/webapp/xnat-templates/screens/topBar/Browse.vm

...in/webapp/xnat-templates/screens/topBar/Browse/Default.vm