Add an option to turn off the auto selection of a matching record after typing in the component's input area and then clicking away.

Currently, the component automatically selects the respective item with text matching the input. For example: https://demos.telerik.com/aspnet-core/combobox/serverfiltering

1. Type in Chang in the input area and then click away.
2. After clicking away, the text Chang remains in the input and if you reopen the list, the ComboBox shows the item with text Chang as selected.