make OpenService injectable
simplified LiveExpressions and ProcessView
removed backend references from OpenUtils
implement getPltFiles in Java, it's just a utility
let wrangler get a backend directly
let trace plugin get its own backend
rename BackendCore.getBuildOrIdeBackend and let BackendManager decide which build backend to use
let LiveExpressions get backend directly, not from engine
fix in hover: just use project's build backend
remove callse to deprecated method
fix bug with unused debug options manager
small stuff in EdocView