Control blur functionality

[YevgeniyShunevych]

Add blur (remove focus) functionality to Control<TOwner>.

Implementation

Control<TOwner>

Add method to Control<TOwner>:

/// <summary>
/// Removes focus from the control.
/// Executes an associated with the component <see cref="BlurBehaviorAttribute"/>
/// that is <see cref="BlursUsingScriptAttribute"/> by default.
/// Also executes <see cref="TriggerEvents.BeforeBlur" /> and <see cref="TriggerEvents.AfterBlur" /> triggers.
/// </summary>
/// <returns>The instance of the owner page object.</returns>
public TOwner Blur();

TriggerEvents

Add BeforeBlur and AfterBlur values to TriggerEvents.

Behaviors

Add abstract BlurBehaviorAttribute and BlursUsingScriptAttribute as a default implementation.

UIComponentScriptExecutor<TOwner>

Add method to UIComponentScriptExecutor<TOwner>.

public TOwner Blur();