Feature summary: Allow Entity Schemas in the EntitySchema namespace to have their labels, descriptions and aliases edited the same way as Items and Properties.

Use case(s): The Entity Schema stores labels, aliases and descriptions in the same way as Items and Properties, but has a basic table display and editing them requires going to a special page.

Benefits: It would make it much easier to edit the labels, aliases and descriptions. It would also give a more consistent experience.

Notes: This ticket is about the UI on the EntitySchema page. We also need to think about the Special Pages like Special:SetLabel.