Suppress subtotals/aggregation for certain columns in a matrix

[HalffCraig]

For certain types of columns, such as text columns, it is often the case that one does not want ANY value to show in the subtotal row for that particular colmn (value),  Currently, you are forced to select an aggregation type like count, count distinct first, etc.  There should be a "None" option so that when records are grouped/rolled up, you can indicate that a particular field should simply not be aggregated at all.

Example:

Dept/Client/Project	Created Date	Stage	Est. Fee	Est. Profit
Civil Engineering			868,000	86,800
City of ABC			350,000	35,000
Project 1	1/1/2025	Fee Negotiations	150,000	15,000
Project 2	2/5/2025	Proposal Prep.	200,000	20,000
City of XYZ			518,000	51,800
Project 1	2/8/2025	Lead	310,000	31,000
Project 2	3/4/2025	Selected	208,000	20,800

Note how we have three levels of grouping in this matrix, the department, client, and the "detail" level the project.  For each project, it makes sense to show values for all the columns.  When rolling up to the Client level, while it does make sense to aggregate (sum) the numeric phases, in most cases it is undesirable to show any subtotal value for, in this case, the date or text columns namely Created Date and Stage.

I realize that one could include those values as matrix-rows instead of matrix-values, but typically you do not want to group your records by these fileds and just want to display their vales at that lowest level.