Auto ordering of variables-section when dependent variables

[snakefoot]

Trying to resolve #736

This is not a perfect safety-net, but will catch the most obvious cases, when using references to other variables. To improve the user-experience when the automatic ordering interferes unexpectedly.

It will fallback to the original order when unable to unravel the correct ordering.

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 71.42857% with 16 lines in your changes are missing coverage. Please review.

Project coverage is 80.83%. Comparing base (b77d209) to head (e300f3b).
Report is 1 commits behind head on master.

Files	Patch %	Lines
...ensions.Logging/Config/NLogLoggingConfiguration.cs	71.42%	9 Missing and 7 partials ⚠️

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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #737      +/-   ##
==========================================
- Coverage   81.18%   80.83%   -0.35%     
==========================================
  Files          19       19              
  Lines        1743     1790      +47     
  Branches      311      319       +8     
==========================================
+ Hits         1415     1447      +32     
- Misses        188      197       +9     
- Partials      140      146       +6     

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