[combo-box] Add debounce to data requests

[rolfsmeds]

Addresses https://github.com/vaadin/vaadin-combo-box/issues/997

[sissbruecker]

It looks like the Flow component already uses a debounce of 500ms: https://github.com/vaadin/flow-components/blob/master/vaadin-combo-box-flow-parent/vaadin-combo-box-flow/src/main/resources/META-INF/resources/frontend/comboBoxConnector.js#L97-L99

If we want to implement a debounce in the web component, we need to remove it there and also figure out what this part is doing: https://github.com/vaadin/flow-components/blob/master/vaadin-combo-box-flow-parent/vaadin-combo-box-flow/src/main/resources/META-INF/resources/frontend/comboBoxConnector.js#L143-L150

[lanmaster]

Is there workaround to change debounce value on ComboBox?

[Aleksey2093]

It looks like the Flow component already uses a debounce of 500ms: https://github.com/vaadin/flow-components/blob/master/vaadin-combo-box-flow-parent/vaadin-combo-box-flow/src/main/resources/META-INF/resources/frontend/comboBoxConnector.js#L97-L99

If we want to implement a debounce in the web component, we need to remove it there and also figure out what this part is doing: https://github.com/vaadin/flow-components/blob/master/vaadin-combo-box-flow-parent/vaadin-combo-box-flow/src/main/resources/META-INF/resources/frontend/comboBoxConnector.js#L143-L150

vaadin/flow-components#6863 (comment)