Runs over all files in api/js/etemplate/<widget>/test and <app>/js/test folders
Run from the commandline with: npm jstest
Can also run & watch for changed files, check package.json for scripts.
- Some legacy widgets can not provide their DOMNode right away, but some give errors when we ask at the wrong time. Now catching those.
- Grid could not set disabled on web components, causing error
- Boxes were trying to work on labels they didn't have, causing error
