[BUG] - Not able to rename tooltip (remove name of aggregation function for numeric types is tooltip)

[Saadyounus]

Description:
When I put a numeric value/measure in tooltip, it says Sum . I can change the name of the measure by clicking "rename for this visual", but the aggregation function always show in the tooltip, that I don't want to show.

To Reproduce
Steps to reproduce the behavior:

1. In a mapbox visual, add a numeric measure in the tooltip and set aggregation as "Sum"
2. Hover over the map for tooltip to display
3. See error (it'll show sum

Expected behavior
I am expecting to be able to remove the name of aggregation function from the tooltip display when hovering over the map.

Screenshots