IDE: project options: fixed build modes diff showing modes

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41492 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: project options: select active mode in diff dialog

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@41493 4005530d-fff6-0310-9dd1-cebe43e6787f