add variables corresponding to properties in FileRenameSheetController

git-svn-id: svn://svn.transmissionbt.com/Transmission/trunk@13876 f4695dd4-2c0a-0410-b89c-da849a56a58e
more variables corresponding to properties in FileRenameSheetController

git-svn-id: svn://svn.transmissionbt.com/Transmission/trunk@13877 f4695dd4-2c0a-0410-b89c-da849a56a58e