Fix issue with managedObjectContextDidSave notification.

bugFix

/* Can be called from any thread */
- (void)managedObjectContextDidSave:(NSNotification *)note
{

    // FIX: you must mergeChangesFromContextDidSaveNotification: on main thread
    // handling the notification occurs on background thread.
    // it needs to "merge" on the main thread.
    // From: http://benford.me/blog/2012/5/7/an-observer-of-nsmanagedobjectcontextdidsavenotification-html
    NSManagedObjectContext *context = (NSManagedObjectContext *)note.object;
    if( context.persistentStoreCoordinator == managedObjectContext.persistentStoreCoordinator ){
        [managedObjectContext performSelectorOnMainThread:@selector(managedObjectContextDidSave:)
                                               withObject:managedObjectContext waitUntilDone:NO];
    }
    
    /*
    UMTRACE;
  @try 
	{
		if ([NSThread isMainThread]) 
		{
			[managedObjectContext mergeChangesFromContextDidSaveNotification:note];

		} 
		else 
		{
			[self performSelectorOnMainThread:@selector(managedObjectContextDidSave:)
								   withObject:note 
								waitUntilDone:NO];
		}		
	} 
	@catch (NSException *exception) 
	{
		DebugLog(@"Exception caught in when merging change insert changes with fetch:\n %@", exception);
	}	
     
     */
}