Add ScrollTo method to Control<TOwner>

[YevgeniyShunevych]

Add method to Control<TOwner>:

public TOwner ScrollTo();

Behaviors

Add scroll behavior attribute classes:

• ScrollBehaviorAttribute (base) - can be inherited for custom scrolling behavior.
• ScrollUsingMoveToElementAttribute (used by default) - performs Actions.MoveToElement(IWebElement) action.
• ScrollUsingScrollIntoViewAttribute - performs JavaScript element.scrollIntoView(true) function.

Trigger Events

Add BeforeScroll and AfterScroll values to TriggerEvents enum. ScrollTo method executes corresponding triggers.