Add splitter to rundialog to facilitate UI adjustments

[andreas-el]

Resolves #8400

Rundialog realization circles and job info table can now be vertically adjusted using the divider between them.
There will be a visual indicator (mouse hand) that hints that the divider is draggable/adjustable.

• PR title captures the intent of the changes, and is fitting for release notes.
• Added appropriate release note label
• Commit history is consistent and clean, in line with the contribution guidelines.
• Make sure tests pass locally (after every commit!)

When applicable

• When there are user facing changes: Updated documentation
• New behavior or changes to existing untested code: Ensured that unit tests are added (See Ground Rules).
• Large PR: Prepare changes in small commits for more convenient review
• Bug fix: Add regression test for the bug
• Bug fix: Create Backport PR to latest release

[codecov-commenter]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 90.67%. Comparing base (c27d368) to head (a0074ea).

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #8449   +/-   ##
=======================================
  Coverage   90.66%   90.67%           
=======================================
  Files         346      346           
  Lines       21018    21022    +4     
=======================================
+ Hits        19057    19062    +5     
+ Misses       1961     1960    -1     

Flag	Coverage Δ
gui-tests	75.94% <100.00%> (+0.03%)	⬆️
integration-tests	54.00% <0.00%> (+0.01%)	⬆️
unit-tests	68.69% <0.00%> (-0.02%)	⬇️

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[sondreso]

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[DanSava]

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