Notably:
- Import logger improvements from uBO
- Import CNAME uncloaking from uBO
- Import more improvements from uBO
- Make use of modern JS features
This should un-stall further development of uMatrix.
- us integer tab id -- do not stringify anymore
- improved the parsing of hosts files
- better handling of behind-the-scene network requests when a
context is provided by the webRequest API
- imported webextFlavor code from uBO
- converted instances of object-as-dict to Map()
vAPI.sessionId - random ID generated every time when a page loads.
Having the dialog in an iframe lowers the chance of interference with the
styling of the page, also avoids using innerHTML (AMO complaint).