Detailed implementation according to attached screenshots should be done in MGNLPN-69.

As a first step we completely dismiss the 'drop down arrows' next to variant nodes.
We do however implement a custom column formatter (only return HTML String) to deal with icons or resolve "name" for a variant.

• Pages app configuration:
  • make mgnl:variants node available
  • disable pages actions on variants node

TemplateColumnFormatter will also throw an exception due to an undefined templateId once mgnl:variants is enabled in the configuration of the PagesApp.