fix CPArrayController removeObject:

removeObject: only shifted the selection, it never actually removes the object

AppKit/CPArrayController.j

@@ -426,12 +426,14 @@
    [_contentObject removeObject:object];
    [self didChangeValueForKey:@"content"];
 
-   if ([_filterPredicate evaluateWithObject:object])
+   if (_filterPredicate === nil || [_filterPredicate evaluateWithObject:object])
    {
         [self willChangeValueForKey:@"selectionIndexes"];
         var pos = [_arrangedObjects indexOfObject:object];
 
+        [_arrangedObjects removeObjectAtIndex:pos];
         [_selectionIndexes shiftIndexesStartingAtIndex:pos by:-1];
+
         [self didChangeValueForKey:@"selectionIndexes"];
    }
 }