Do not enable splash for framebuffer, as Plymouth glitches the framebuffer on VirtualBox

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3069 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Fix path to splash

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3070 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Add menu items for the help dialog, and shutdown dialog

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@3071 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9