CMake DAP debugger bugs

While testing CMake DAP debugger encountered some issues.

1) Watch expressions don't work

2) when trying to debug a cmake project that does not create any executables in the project, starting cmake DAP fails with an error message that says "You need to set an executable in the custom run configuration"

3) When clicking step over, if any section was expanded in the variable views pane (e.g. Locals, Targets), the section gets collapsed / closed.
This makes it difficult to track variable value changes after an instruction is executed.
Ideally anything expanded stays expanded, as well as the scroll position.