use alt modifier for page keyboard navigation
($keyboard_navigation_pages_use_alt off by default)

git-svn-id: http://svn.resourcespace.org/svn/resourcespace@5684 c08608d7-6e46-0410-86ca-f2a6f1370df5
FIX undefined variable kwpos, should be called 'position'

git-svn-id: http://svn.resourcespace.org/svn/resourcespace@5685 c08608d7-6e46-0410-86ca-f2a6f1370df5