Fix multi-cluster dropdown

This PR fixes a couple of issues we have seen in our multi-cluster environment:

First, the dropdown to select cluster wasn't appearing when we added the second cluster due to an incorrect count() comparison for the $grid array.

Once the array size check was fixed, we noticed the second cluster still wasn't showing. This turned out to be caused by a filtering of the cluster if the cluster name was the same as the grid name when in the "meta" context.