Latest style and other updates for the admin ui and Spawner™ functionality.

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

src/main/webapp/WEB-INF/tags/spawner/layout.tag

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

src/main/webapp/page/admin/tabs.js

src/main/webapp/scripts/xmodal-v1/xmodal.js

src/main/webapp/scripts/xnat/ui/input.js

src/main/webapp/scripts/xnat/ui/panel.js

src/main/webapp/scripts/xnat/ui/templates.js

src/main/webapp/scripts/xnat/url.js

src/main/webapp/scripts/xnat/xhr.js

src/main/webapp/setup/index.jsp

src/main/webapp/style/app.css

...webapp/xdat-templates/screens/XDATScreen_admin_options.vm

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

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

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

...webapp/xnat-templates/screens/XDATScreen_admin_options.vm

...ebapp/xnat-templates/screens/topBar/Administer/Default.vm