Running the command vscode-edge-devtools-view.close-instance does not close the instance

Environment (please complete the following information):

• OS: Microsoft Windows 10 Pro v2009 (Win32NT 10.0.19044.0)
• Machine: Surface Pro 3
• Extension version: 2.1.1

Describe the bug:

When launching a debugging session with default settings (e.g. no launch.json) using the Launch Edge Headless and attach DevTools (workspace) or any other preset, the command vscode-edge-devtools-view.close-instance in Ctrl + Shift + P, does not close the instance. You can close it normally using either the Edge DevTools sidebar or the floating debug menu.

Unless I've misunderstood something, I'd think vscode-edge-devtools-view.close-instance should do the same as the close instance buttons. If this is not intended behavior, I think this would be a nice feature request for use with Visual Studio Code Tasks and Launch configurations. Though issue #846 needs to be fixed for that to be useful.

Repro steps:

1. Start a debugging session using a default preset like Launch Edge Headless and attach DevTools (workspace)
2. Open the command launcher with Ctrl + Shift + P
3. Run the command vscode-edge-devtools-view.close-instance or Microsoft Edge Tools: Close Instance

Expected behavior:

1. Start a debugging session using a default preset like Launch Edge Headless and attach DevTools (workspace)
2. Open the command launcher with Ctrl + Shift + P
3. Run the command vscode-edge-devtools-view.close-instance or Microsoft Edge Tools: Close Instance
4. The session ends and the Edge DevTools closes like when you end the session through the Edge DevTools sidebar or floating menu.

Start by tracing the vscode-edge-devtools-view.close-instance command used from the Command Palette, then compare it with the close-instance buttons in the Edge DevTools sidebar and floating debug menu. Reproduce the default-preset debugging session and verify that the command ends the session and closes Edge DevTools in the same way.