[Experimental Dashboards] : Cannot select "All" in dashboard filter

User impact:

Users cannot select "All" in filters. 

Steps to reproduce:

Dev Latest Instance with MongoDB clients

Open one of the following dashboards:

• Experimental / MongoDB Collection Details
• Experimental / MongoDB Collection Overview
• Experimental /MongoDB Oplog Details

Set refresh to 5s

Unselect everything in filters.

Actual result:

Users cannot select "All" in filters (It depends on the dashboard which of them):

• Environment
• Cluster
• Replica set

If the user will unselect all and has "Refresh dashboard" on every time when the dashboard is refreshed original filter will be set on. 

See GIF in the attachments

Expected result:

Users can filter "All", and filters stay that way after dashboard refresh.

Workaround:

Details: