remove logging, add begin/end updates

Ample/DiskImagesWindowController.m

@@ -250,7 +250,6 @@
 
 -(IBAction)doubleClick: (id)sender {
     NSDictionary *d = [self clickedItem];
-    NSLog(@"%@", d);
     
     NSNotificationCenter *nc = [NSNotificationCenter defaultCenter];
     

Ample/MediaViewController.m

@@ -778,8 +778,11 @@ static NSString *kDragType = @"private.ample.media";
             return NO;
     }
 
+    [_outlineView beginUpdates];
+    // todo -- check root, insert if necessary?
     MediaCategory *cat = _data[ix];
     [cat addURL: url];
+    [_outlineView endUpdates];
 
     [self rebuildArgs];
     return YES;