Handle coexistence of BLP sources and refrimprove

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code/AWB@10481 5227b50d-9349-4574-b055-4b0a7525e11c
fix for ArgumentOutOfRangeException in MainForm.RedSelection

git-svn-id: svn://svn.code.sf.net/p/autowikibrowser/code/AWB@10482 5227b50d-9349-4574-b055-4b0a7525e11c