Fixed issue where only the last line was aligned in the case of a multiline input...

If you try to ALIGNMENT after entering multilines, only the last line is aligned.
So when the _ALIGNMENT property is entered, we modify it to be a full aligned.

ex)
    textEditor2 = TextEditor::New();
    textEditor2.SetBackgroundColor( Color::CYAN );
    textEditor2.SetProperty( TextEditor::Property::TEXT_COLOR, Color::YELLOW );
    textEditor2.SetSize( 500.f, 500.f );
    textEditor2.SetPosition( 900.f, 150.f );
    textEditor2.SetAnchorPoint( AnchorPoint::TOP_LEFT );
    textEditor2.SetProperty( TextEditor::Property::TEXT, "test test " );
    stage.Add( textEditor2 );

    Control control2 = Control::New();
    control2.SetSize(80,80);
    control2.SetBackgroundColor(Color::YELLOW);
    control2.SetPosition(750,200);
    control2.SetAnchorPoint( AnchorPoint::TOP_LEFT );
    control2.TouchSignal().Connect(this, &HelloWorldController::OnTouch3);
    stage.Add( control2 );

  bool OnTouch3( Actor actor, const TouchData& touch )
  {
    textEditor2.SetProperty( TextEditor::Property::TEXT_COLOR, Color::RED );
    textEditor2.SetColor(Color::BLUE );
    textEditor2.SetProperty( TextEditor::Property::HORIZONTAL_ALIGNMENT, "END" );
    return true;
  }

Change-Id: Icc98d04d7c556a4d33b5de8640c2fc29587c1b35