scm: use default title for tab if no page has yet been created; redirect to course main page when aborting creation of first scm page, fixes #3649, re #3557

git-svn-id: svn://develop.studip.de/studip/trunk@27373 c5b85792-5220-0410-ad23-ed5b6b8ad999
scm: use default title for tab if no page has yet been created; redirect to course main page when aborting creation of first scm page, fixes #3649, re #3557

git-svn-id: svn://develop.studip.de/studip/trunk@27374 c5b85792-5220-0410-ad23-ed5b6b8ad999