CONN-1224: Remove Scroller from Login Sidebar

This PR updates one visible item: (1) The scroller is removed from the sidebar on the Login page.

Side Note: This PR also addresses the newly missing favicon as noted in Visual Defects 5 of the AdminGUI Improvements Wiki (https://connectopensource.atlassian.net/wiki/pages/viewpage.action?spaceKey=FCPT&title=Admin+GUI+Improvements). Also did some minor reformatting.

CSS:
* pf-override.css -- corrected hover state CSS for sidebar.

XHTML:
* BaseTemplate.xhtml -- restructured the HTML, moving all sidebar elements to sidebar file.
* BaseTemplatePrime.xhtml -- restructured the HTML, moving all sidebar elements to sidebar file.
* SidebarForLogin.xhtml -- restructured with newly moved elements.
* SidebarPaneForBaseTemplate.xhtml -- restructured with newly moved elements.
* SidebarPaneForBaseTemplatePrime.xhtml -- restructured with newly moved elements.