(-filesForOpenOfType:multiple:title:accView:): Removed
(-fileForSaveOfType:title:accView:): Removed.
(-filesForAddOfTypes:): Removed.
(-filesOfTypes:operation:multiple:title:accView:): Implemented.
Replaces removed methods.
(-_panelForOperation:title:accView:): New method. Returns panel
for specified operation type.
(-_saveLastDirectoryForPanel:): New method. Saves last opened
directory for operation type (panel).
(-panel:isValidFilename:): Validate directory as correct filename
if project is opening and directory has PC.project file.
* Headers/ProjectCenter/PCFileManager.h: Added new variable 'operation'
and declaraion of new mathods.
* Framework/PCProjectManager.m: Use new methods of PCFileManager.
git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/apps/projectcenter/trunk@25422 72102866-910b-0410-8b05-ffd578937521