Support "python.autoComplete.showAdvancedMembers" to hide dunder attributes

[StepVK]

Environment data

• Language Server version: 2020.12.2
• OS and version: Windows 10
• Python version (& distribution if applicable, e.g. Anaconda): 3.9.1 64bit

Expected behavior

When I set
JSON: ("python.autoComplete.showAdvancedMembers": false)
GUI: "Python › Auto Complete: Show Advanced Members
Controls appearance of methods with double underscores in the completion list."
to false, I expect methods and attributes with names starting with "__" to not show up in autocomplete, when called from other scopes.

Actual behavior

"__" methods and attributes show up in autocomplete regardless of that option.

Code Snippet / Additional information

Seeing _stopped is ok,
__thread shouldn't be there, as shouldn't all the "magic" methods starting with __

[judej]

Moving this issue to discussion as an enhancement request for comments and upvotes.

[PolarBean]

this would be very useful