Digital Distortion mod refactor: Remove use of backslash() (just append a /); use js.exec_dir instead of the old hack to find the startup directory. No functional change.

Digital Distortion mod refactor: Remove use of backslash() (just append a /); use js.exec_dir instead of the old hack to find the startup directory. No functional change.

assigned to @rswindell

enabled an automatic merge when the pipeline for e27b60cc succeeds

mentioned in commit e8bd9f0e

merged