Render control tag and dimensions as a flat list in the dropdown.

[chandru89new]

Avoid the need for having 3 side-by-side select controls when setting a control tag or dimension filter / group.

Combine these into a flat list in the existing "key" select controls.

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This issue is stale because it has been open 60 days with no activity. Remove stale label or comment or this will be closed in 30 days.

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This issue was closed because it has been stalled for 90 days with no activity.