Unable to display text gcode in main app or viewer (2.3.57.12), also wrong line numbers

What happened?

Related to #1555.

In PrusaSlicer, while moving around the sliced print with the navigation sliders in gcode preview, a text view of the gcode can be displayed with the cursor moving to the right line automatically. I am told this does exist in SuperSlicer but it doesn't with me - either in the main app or viewer - on the above version (still using this as it is labelled as 'last stable').

Not sure therefore if this is a missing feature from SuperSlicer compared to PrusaSlicer, or something that is meant to work but doesn't, or something that needs enabling (though I cannot see how).

There is a line number display on the layer slider, but actually, the line numbers do not appear to correspond with the right positions in the file - I suspect this may be because it is not taking account of comment lines.

Project file & How to reproduce

Slice any print preview gcode try to see text gcode linked to slider position in display

Version

2.3.57.12

Operating system

Windows 10

Printer model

n/a

supermerill / SuperSlicer