IDE: codebrowser: warn for units with non unit file extension

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44247 4005530d-fff6-0310-9dd1-cebe43e6787f
LCL: fixed file types

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@44248 4005530d-fff6-0310-9dd1-cebe43e6787f