westonlaunchcaller: when the guest session dies, terminate the host session. 

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2781 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
waylandloginmanager: fix the detection of support for WL sessions, fix accidentally removed line, make it check to see if WL sessions are supported by westonlaunchcaller in Framebuffer fallback mode as well

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2782 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9
Increase the threshold from 5 seconds to 15 seconds to deem its safe to switch back to the login manager, after 15 seconds now it is considered the user might have another session open, and won't switch back automatically.

git-svn-id: https://rebeccablackos.svn.sourceforge.net/svnroot/rebeccablackos@2783 56e3d1a8-0179-4092-b3e2-9fbbcda0c0a9