AUP3: Offer the active project name for Save Backup

This provides a "template" for the user to modify.

src/AutoRecoveryDialog.cpp

@@ -316,8 +316,6 @@ static bool RecoverAllProjects(const FilePaths &files,
       {
          return false;
       }
-
-      ActiveProjects::Remove(files[i]);
    }
 
    return true;

src/ProjectFileManager.cpp

@@ -547,7 +547,6 @@ bool ProjectFileManager::SaveCopy(const FilePath &fileName /* = wxT("") */)
       else
       {
          filename = projectFileIO.GetFileName();
-         filename.SetFullName(wxT(""));
       }
    }