Vscode-java-debug: filter for call stack

[blassmegod]

[provide a description of the issue]

Environment

• Operating System: any
• JDK version: any
• Visual Studio Code version: latest
• Java extension version: latest
• Java Debugger extension version: latest

Steps To Reproduce

1. [step 1]
2. connect the debugger to a running process
3. [step 2]
4. stop on some breakpoints

[attach a sample project reproducing the error]
[attach logs](https://github.com/redhat-developer/vscode-java/wiki/Troubleshooting#enable-logging)

Current Result

Call Stack view has no filtering option.

Expected Result

Call Stack view to have a filtering option.

Additional Informations

Would be nice to have a filtering option so one can filter either by thread name or by status of threads, like RUNNING, SUSPENDED, or whatever status there is. It can help a lot in situations where there are many threads running and the breakpoints stop on multiple parallel threads, so switching from one to the other would be much quicker.

[testforstephen]

vscode already supports this. You can click on call stack view and start typing.

[the21st]

I want to filter by file (so that I only see my files in the stack), but that's not possible