codetools: fixed FindDiskFilename to recursively check all directories

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41553 4005530d-fff6-0310-9dd1-cebe43e6787f
codetools: CheckUsesSection: fix directories too

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41554 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: fixed compilation

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41555 4005530d-fff6-0310-9dd1-cebe43e6787f