Dynamic max value calculated per Column instead of whole Table

[FireEmerald]

What happened:
If you use a Override for a column to set the Cell display mode to Gradient gauge, the maximum is calculated based on all values of all columns.

What you expected to happen:
The maximum should be only calculated per column, not between different columns.

How to reproduce it:

• Create a new panel: Visualization -> Table
• Set: Format as: Table
• Query:

SELECT
 c1 as time,
 c2 as small,
 c3 as large
FROM (VALUES
  (1,10,1000), (2,20,2000), (3,30,3000)
) t1 (c1, c2, c3)

• Create override: Overrides -> Cell display mode -> Gradient gauge

Environment:

• Grafana version: v7.5.7 (91de517)

[torkelo]

duplicate of #26383