Clicking on a grouped cluster does not zoom

[omnilord]

Clicking on a grouped cluster of resources on a map doesn't do anything, but the UX feels like it should. The expectation from other implementations using marker clusters would be for it to zoom into the level where the cluster is declustered.

[eloisejones]

Meant to claim this! Will be sending a PR shortly. Not perfection, but it does function as one would expect.