Upper Limit When Selecting Multiple Tests to Run

[dsanders11]

Add a context menu/inline for selecting tests to run so you can do multiple tests in one go. Would need to figure out the UI to make it visually clear to users (ability to add colors would be nice), maybe a way to filter only the selected tests. Probably would need to do multiple runs of spec-runner.js to avoid command line length issues, and the hairiness of a super big regex for the selected tests. Could possibly be done in parallel.

[dsanders11]

The UI for this is supported thanks to the VS Code testing view, so just need to better support it in the test runner - do separate test runs instead of regex to avoid command-line length.

[dsanders11]

Changing this to a bug (low priority) to track that this works, but you'll run into a failure at an upper limit at some point if you try to select too many different tests to run. Since this is a niche use case, not worth putting much effort into fixing, but tracking it here.