Description of the problem:

Clusters dropdown filter only displays list for the first cluster

In the Resource Optimization Filters if the user clicks in the 'Clusters' label a dropdown list of the available clusters is displayed, once the user selects the first cluster this dropdown list is no longer available. it would be optimal to show the list of available clusters for each cluster entry in the filter, if we don't provided that then we are expecting the user to remember the cluster name. 

How reproducible: 100%

Steps to reproduce:
1. Deploy RO on RHDH
2. Visit the Optimizations tab 
3. In the Filters -> Clusters, click and observe list of clusters, select a cluster 

4. click to enter second cluster name, observe the list of clusters isn't available

Actual results: Clusters dropdown list only displays clusters for the first cluster

Expected results: Cluster list is displayed for each cluster entry

This applies to all filters.

I think I see what is going on here, if the user only displays the first 10 items and all of those items are on the same cluster the only cluster in the dropdown list will be the cluster visible in the Optimizable containers table. Is there are reason we are only looking at the visible items in the table to populate the dropdown list ? I think we can improve this user experience. 

rofilters.webm