Add API or documentation to change the width of the overlay

[jcgueriaud1]

Add API or documentation to change the width of the overlay

[jcgueriaud1]

Related to this:
https://github.com/vaadin/vaadin-combo-box/issues/892

A workaround:
comboBox.getElement().getStyle().set("--vaadin-combo-box-overlay-width", "400px")

vaadin/vaadin-combo-box#942

[jcgueriaud1]

It's also possible to get the maximum length of the items (for example "John Doe") and set the width "dynamically" in characters width: 8ch.

like comboBox.getElement().getStyle().set("--vaadin-combo-box-overlay-width", "calc( margin/padding + max_value ch )").

It requires some calculation and all the data in memory to calculate the maximum width.