`MatrixVis`: customisable fixed-point precision

[axelboc]

Is your feature request related to a problem?

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It would be nice if the number of decimals were adjustable, currently I seem to get only 3 decimals in fixed-point 'matrix' view, so a number is shown as "3.141" but no more digits are visible.

We work with frequency metrology, at least 12 decimal digits should ideally be available.

Requested solution or feature

• Add a toolbar control to the Matrix visualisation to allow users to customise the number of decimal digits in fixed-point notation.
• Consider using this same precision in scientific notation (cf. createNumericFormatter) and for complex numbers (cf. createMatrixComplexFormatter).

[loichuder]

I could not find the link but I am sure that we discussed this before in a previous issue/MR 😄

[axelboc]

Oh I found it: #1646