Permalink malformed & z-index of composition layer

[FilipLeitner]

Description

fix issue #4650 for version 13.x

• fix zindex assignment of composition layers -> should match the composition layer order and not be influenced by path's max zindex
• sort layers in folder based on hsConfig.reverseLayerList

Related issues or pull requests

#4650

Pull request type

Please check the type of change your PR introduces:

• Bugfix
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Checklist

• I understand and agree that the changes in this PR will be licensed under the [MIT License]
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• I have added or updated tests and documentation, and the test suite passes (run npm test locally)
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[jmacura]

note for hslayers-server: decoding URL in the beginning is redundant (fixed in e05185e which is rather unrelated to this PR)

[jmacura]

Thanks 💚

[jmacura]

Commit 48651e1 cherry-picked to #4654 and is already part of develop (and this branch was rebased on top of it).

[jmacura]

Merged into release-13.x branch, needs a port to secondary-entry branch (future develop).