Correct handling buttons inside cells

TableView

- (instancetype)init
{
    self = [super init];
    if (self)
    {
        self.delaysContentTouches = NO;
    }
    return self;
}

- (BOOL)touchesShouldCancelInContentView:(UIView *)view
{
    // Because we set delaysContentTouches = NO, we return YES for UIButtons
    // so that scrolling works correctly when the scroll gesture
    // starts in the UIButtons.
    if ([view isKindOfClass:[UIButton class]])
    {
        return YES;
    }
    
    return [super touchesShouldCancelInContentView:view];
}