I would like to see a functionality where the same pop up configuration can be applied in batch to all the layers in a map. I often work with large datasets wherein all the layers have the same fields. Currently, when creating a map, I copy and paste the pop up configuration (HTML formatting and expressions) to each of the layers. This works, but it is incredibly time consuming and difficult to make quick changes to the pop up as this copy/paste process has to be repeated. It would be useful to configure the pop up once and then use a tool to apply this configuration (and subsequent changes) to all the layers (or specified layers) in the map simultaneously.
