Control of layer ordering

[DanielO]

Is your feature request related to a problem? Please describe.
I would like to be able to display files with the top silkscreen above the top copper.
KiCanvas does the same as KiCAD (ie copper is top most) but I think that is more defensible because it is for designing not viewing (ish)

Describe the solution you'd like
A way of controlling the Z order of layers. eg being able to drag elements in the layer list.

Describe alternatives you've considered
Fills can be set semi transparent which helps but I would like to be able to display a board as it would look IRL to make checking for designer mistakes easier.

Additional context
Add any other context or screenshots about the feature request here.