Made a few UI fixes. Mostly, it's about main menu item not pointing the appropriate target.

cocoa/pe/ResultWindow.h

@@ -11,5 +11,4 @@ http://www.hardcoded.net/licenses/bsd_license
 
 @interface ResultWindow : ResultWindowBase {}
 - (IBAction)clearPictureCache:(id)sender;
-- (IBAction)toggleDirectories:(id)sender;
 @end

cocoa/pe/ResultWindow.m

@@ -67,18 +67,12 @@ http://www.hardcoded.net/licenses/bsd_license
     }
     if (r == 3) {
         [Dialogs showMessage:@"The selected directories contain no scannable file."];
-        [app toggleDirectories:nil];
     }
     if (r == 4) {
         [Dialogs showMessage:@"The iPhoto application couldn't be found."];
     }
 }
 
-- (IBAction)toggleDirectories:(id)sender
-{
-    [(AppDelegate *)app toggleDirectories:sender];
-}
-
 /* Public */
 - (void)initResultColumns
 {