Archetype example application should update URL when selecting items

[vaadin-bot]

Originally by @tehapo

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Example application generated by vaadin-archetype-application-example allows linking directly to items in the inventory.

Unfortunately making a selection in the table does not update the URL. Selecting an item should update the URL to make this feature accessible.

http://demo.vaadin.com/archetype-application/#!Inventory/10

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Imported from https://dev.vaadin.com/ issue #15416