Tabbing to and away from a virtualized ComboBox changes the widget value with the text from its input

[veselints]

Bug report

Tabbing to and away from a ComboBox changes the widget value with the text from its input. This happens when the ComboBox uses virtualization and the initially selected item is not on the first page of the ComboBox DataSource.

This is a regression introduced in R3 2018.3.911

Related to: #3558

Reproduction of the problem

• Run the following Dojo
• Focus the first input - the current value of the ComboBox will be printed on the console;
• Tab to the ComboBox and then away from it - the ComboBox DataSource.data() and the ComboBox.value() will be printed on the console. Note, that the value of the widget has changed to the text populated in the input of the widget;

Expected/desired behavior

The value() of the widget should not change on Tab away

Environment

• Kendo UI version: 2018.3.911
• Browser: [all]