IDE: improve msg cant find unit: debugging

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@39950 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: improve msg cant find unit: fixed loading unit if msg is showing the right unit

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@39951 4005530d-fff6-0310-9dd1-cebe43e6787f