Add ability to build ExpandableToolMenu ToolbarRows recursively.

[andrewwebbdeveloper]

• Add ability to build ExpandableToolMenu ToolbarRows recursively.
• Allows any number of sub-menus ( configured from the toolbarModule ).

PR Checklist

• Brief description of changes
• Links to any relevant issues
• Required status checks are passing
• User cases if changes impact the user's experience
• @mention a maintainer to request a review

[codecov]

Codecov Report

Merging #2611 (74acd56) into master (1e72684) will decrease coverage by 0.06%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master    #2611      +/-   ##
==========================================
- Coverage   13.20%   13.13%   -0.07%     
==========================================
  Files         289      289              
  Lines        7816     7854      +38     
  Branches     1510     1514       +4     
==========================================
  Hits         1032     1032              
- Misses       5474     5508      +34     
- Partials     1310     1314       +4     

Impacted Files	Coverage Δ
platform/core/src/classes/StudyPrefetcher.js	0.69% <0.00%> (-0.03%)	⬇️
...latform/core/src/classes/metadata/StudyMetadata.js	1.29% <0.00%> (-0.02%)	⬇️
.../src/studies/services/wado/studyInstanceHelpers.js	2.04% <0.00%> (-0.19%)	⬇️
...form/core/src/utils/isDisplaySetReconstructable.js	3.37% <0.00%> (ø)
...r/src/connectedComponents/ConnectedStudyBrowser.js	0.00% <0.00%> (ø)
...tform/viewer/src/connectedComponents/ToolbarRow.js	0.00% <0.00%> (ø)
platform/viewer/src/connectedComponents/Viewer.js	0.00% <0.00%> (ø)
...tform/viewer/src/connectedComponents/ViewerMain.js	0.00% <0.00%> (ø)

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[sedghi]

Thanks for your PR and contribution.
I tried it with level 3 nested buttons and it doesn't behave as expected, see below

2021-12-23.16-08-37.mp4

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[sedghi]

base has changed, read more here #3477