* Fixing #4967 (#4968)

* Fix internal error when compiling interface implementation lacking an overloaded method implementation - fixes #4967

* Adding a test

* Update E_OverloadMismatch.fs

* Remove a setify + isSingleton combo (#4980)

* remove a setify

* Remove intermediate collection

* Improve async stack traces (#4867)

* very early prototype

* async stack traces

* async cleanup

* minor fix

* async cleanup

* more async cleanup

* integrate async-cleanup

* async cleanup

* fix build

* more cleanup

* minor fixes

* minor fixes

* full exception stacktraces

* fix test

* fix test

* code review

* cleanup naming

* fix build

* undo rethrow and integrate cleanup

* apply renamings

* Further cleanup in control.fs

* add tests and add filtering TryWith, plus other cleanup

* integrate cleanup

* fix tests

* test only runs on .net framework

* slightly tweak primitives to be more suitable for later optimization

* slightly tweak primitives to be more suitable for later optimization

* update baselines

* add check that no line 0 appear in stack

* update baseline

* use struct wrapper for async activation

* simplify code

* simplify code

* update baselines

* update baselines

* fix baseline

* remove dead code

* simplify code

* apply DebuggerHidden in a couple more places

* [ RFC FS-1039] implementation of value options (#4837)

* posible implementation of value options

* fix surface area test

* fix test

* VNone --> ValueNone

* fix surface area

* fix build

* update baselines

* fix baselines

* fix baselines

* fix baselines

* fix baselines

* fix build