This would be great even if it wasn't hide individual metrics but just hide groups of metrics (for instance Azure Metrics appear regardless of if you have an Azure environment and fill up almost 30 slots (and then duplicates all custom metrics) it makes that box completely over-inflated and harder to find the metrics you're actually after.

This becomes increasingly obvious when you have over 10 custom metrics so can't see the header even so you're trying to get your custom metrics to show things but unfortunatly you're in the wrong group so its just showing 'No results' as there's nothing there to find, while I know this problem its hard dictating to people time and time again, no you're just in the wrong section, go find it under the x group