mvcount() can't count single value columns

[ronja-ui]

Describe the bug

mvcount() can currently count only multivalue columns.

Expected behavior

It should be able to count also columns that has only a single value in it.

How to reproduce

This example works as expected:

| makeresults
| eval x=mvappend("string", "3", "string")
| eval count=mvcount(x)

This however doesn't even if it should return 1 for each row and nothing for the null value:

| makeresults count=4
| eval row=1
| accum row
| eval products=case(row==1,"Book",row==2,"3",row==3,"Magazine")
| eval count=mvcount(products)

Screenshots

Software version

pth_10 version: p47-v8
pth_03 version: 9.4.1

Desktop (please complete the following information if relevant):

• OS:
• Browser:
• Version:

Additional context