Sort messages so they more likely ordered by realization

[oyvindeide]

Issue
Resolves #3435

Pre review checklist

• Added appropriate release note label
• PR title captures the intent of the changes, and is fitting for release notes.
• Commit history is consistent and clean, in line with the contribution guidelines.

Adding labels helps the maintainers when writing release notes. This is the list of release note labels.

[codecov-commenter]

Codecov Report

Merging #3641 (78d9daf) into main (a829b43) will increase coverage by 0.03%.
The diff coverage is 33.33%.

@@            Coverage Diff             @@
##             main    #3641      +/-   ##
==========================================
+ Coverage   64.44%   64.48%   +0.03%     
==========================================
  Files         594      594              
  Lines       46388    46388              
  Branches     4186     4186              
==========================================
+ Hits        29896    29912      +16     
+ Misses      15140    15125      -15     
+ Partials     1352     1351       -1     

Impacted Files	Coverage Δ
src/ert_shared/models/base_run_model.py	76.77% <33.33%> (ø)
src/libres/lib/res_util/block_fs.cpp	68.57% <0.00%> (+0.40%)	⬆️
src/ert/gui/ertwidgets/__init__.py	77.27% <0.00%> (+2.27%)	⬆️
src/ert/gui/ertwidgets/validationsupport.py	98.63% <0.00%> (+19.17%)	⬆️

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[sondreso]

LGTM