`Close` and `Comment` buttons should be the same as GitHub

[shoulders]

The issue

• The buttons in the VSCode extension and on the GitHub issue page are not the same.
• The Close Issue button is on the wrong side.

Background

GitHub

• Close Issue
  • Close as completed
  • Close as not planned
  • Close as duplicate
• Comment

• Close with comment

VSCode

• Close Issue
• Comment

Solution

• Make the buttons in VSCode match those on GitHub

Related Issues

• Add a "comment and resolve" button Add a "comment and resolve" button #3568