Add option to transform filter to use a list of values

[einarmo]

List can either be included directly in config, or read from a local file.

This PR also (mostly) removes the browse-callback functionality, which hasn't worked for years, so nobody can possibly be using it.

[codecov]

Codecov Report

Attention: Patch coverage is 91.03139% with 20 lines in your changes missing coverage. Please review.

Project coverage is 82.85%. Comparing base (2554fba) to head (6ba0786).

Additional details and impacted files

@@           Coverage Diff           @@
##           master     #663   +/-   ##
=======================================
  Coverage   82.85%   82.85%           
=======================================
  Files         123      123           
  Lines       17696    17763   +67     
  Branches     2648     2657    +9     
=======================================
+ Hits        14662    14718   +56     
- Misses       2224     2236   +12     
+ Partials      810      809    -1     

Files	Coverage Δ
Extractor/UAExtractor.cs	78.98% <100.00%> (-0.03%)	⬇️
Extractor/NodeTransformation.cs	77.68% <0.00%> (-8.86%)	⬇️
ExtractorLauncher/Program.cs	83.69% <75.00%> (-0.40%)	⬇️
Extractor/Config/ExtractionConfig.cs	91.87% <91.42%> (-1.29%)	⬇️

... and 9 files with indirect coverage changes