Shapes: Various improvements

[gregoire-dl]

Description

This pull request focuses on shape-specific improvements.
It corrects minor bugs, and introduces new utility methods.

Unit tests cover:

New methods getShapeAsDict and getShapesAsDicts

Features list

• New methods getShapeAsDict and getShapesAsDicts
• Fix link expression in getValueAsDict
• Fix shape file updates
• Fix vertical scrolling visibility in ShapeEditor.
• Remove expandable list for shapes in ShapeEditor.
• Remove itemHeader expand button for shapes in ShapeEditor.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.74%. Comparing base (7cac2bf) to head (e13747c).

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #2913      +/-   ##
===========================================
+ Coverage    80.61%   80.74%   +0.12%     
===========================================
  Files           55       55              
  Lines         7692     7728      +36     
===========================================
+ Hits          6201     6240      +39     
+ Misses        1491     1488       -3     

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