QOL improvements for named systems

[baggepinnen]

closes #112

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 66.66667% with 5 lines in your changes missing coverage. Please review.

Project coverage is 90.53%. Comparing base (333b2d5) to head (ae72457).
Report is 3 commits behind head on master.

Files with missing lines	Patch %	Lines
src/named_systems2.jl	66.66%	5 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #113      +/-   ##
==========================================
- Coverage   90.63%   90.53%   -0.10%     
==========================================
  Files          19       19              
  Lines        2786     2801      +15     
==========================================
+ Hits         2525     2536      +11     
- Misses        261      265       +4     

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