Problem:

• install Java debugger
• open a folder with no launch.json
• switch to debug view and press gear button

Observe:
it looks like nothing is happening but in reality Java is initialising and starting Java language server. After a long time the debug env drop down appears.

Analysis:
Building the debug env drop down seems to activate all debug extensions.

Solution:
We should try to build the debug env drop down list only from declarative information found in the package.json. No debugger extensions should be activated for this.

/cc @aeschli