EH Debugging broken - extension is not loaded

[isidorn]

1. Starter extension, hit F5
2. New window gets opened -> extension is not loaded, notice that the "Hello World" command is not in the command palette

I bisected it down to this commit

7a67a54 is the first bad commit
commit 7a67a54
Author: Martin Aeschlimann martinae@microsoft.com
Date: Thu Sep 5 15:39:01 2019 +0200

extensionDevelopmentPath is string[]

fyi @joaomoreno @weinand