fix #1260: include points in plotting limits

[janfb]

• fixes points are not included in limits in pairplot  #1260 by including the points, if passed, into the automatic inferring of the plotting limits.
• some refactoring.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 78.29%. Comparing base (becc93c) to head (d03420f).
Report is 4 commits behind head on main.

Additional details and impacted files

@@             Coverage Diff             @@
##             main    #1265       +/-   ##
===========================================
- Coverage   89.24%   78.29%   -10.95%     
===========================================
  Files         119      119               
  Lines        8691     8705       +14     
===========================================
- Hits         7756     6816      -940     
- Misses        935     1889      +954     

Flag	Coverage Δ
unittests	78.29% <100.00%> (-10.95%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
sbi/analysis/plot.py	68.46% <100.00%> (-16.26%)	⬇️

... and 32 files with indirect coverage changes

[michaeldeistler]

Thanks! Quick question below!

[michaeldeistler]

Hmm, I would suggest to compute the epsilon range differently, see below. Let's discuss if you disagree!

[michaeldeistler]

LGTM, thanks!