Increase the number of possible detector layers to 40

[Zehvogel]

For some detectors (e.g. CLD) 20 is not enough when using the DDCEDViewer. The remaining magically can still be drawn but then not be toggled on/off. Therefore I naively doubled this to be able to handle 40 detector parts in the hopes that it will be good enough for the foreseeable future.

I tested this locally and it looks like nothing broke, but who knows with this code...

BEGINRELEASENOTES

• Increased the number of possible detector layers to 40

ENDRELEASENOTES

[Zehvogel]

can anyone take a look at this? maybe @tmadlener (I don't know if you are also responsible for this repo :D)

[andresailer]

@Zehvogel Could you update the CI jobs to the recent ones, like in iLCSoft/MarlinReco#128 ?

[tmadlener]

Looks good to me, although I am wondering whether there is something more clever to be done about the displaying stuff.

[Zehvogel]

I am wondering whether there is something more clever to be done about the displaying stuff.

Probably yes, but I don't have the time for more effort than this 🤷

[tmadlener]

It solves a problem now and I would not know who could look into this in more depth at the moment, so we take it as it is.