Add a "diff" view to the release tracks

[adpare]

Add a diff view to the release tracks to be able to distinguish between candidates, staged and members

[codecov-commenter]

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Codecov Report

❌ Patch coverage is 20.53571% with 267 lines in your changes missing coverage. Please review.
✅ Project coverage is 40.22%. Comparing base (aca11cc) to head (a982ebb).

Files with missing lines	Patch %	Lines
...release-track-page/release-track-page.component.ts	17.91%	197 Missing ⚠️
...p/components/stix/stix-list/stix-list.component.ts	30.90%	38 Missing ⚠️
src/app/classes/stix/relationship.ts	11.76%	15 Missing ⚠️
...pp/views/stix/stix-dialog/stix-dialog.component.ts	29.41%	12 Missing ⚠️
...x/relationship-view/relationship-view.component.ts	0.00%	3 Missing ⚠️
src/app/views/stix/stix-view-page.ts	0.00%	2 Missing ⚠️
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Additional details and impacted files

@@            Coverage Diff             @@
##             beta     #905      +/-   ##
==========================================
- Coverage   40.66%   40.22%   -0.45%     
==========================================
  Files         199      199              
  Lines       25471    25763     +292     
  Branches     1278     1310      +32     
==========================================
+ Hits        10359    10363       +4     
- Misses      15067    15355     +288     
  Partials       45       45              

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[clemiller]

Should this fetch use item.object_modified here? Without it, candidate diffs compare always against the latest object, which could potentially drift from the version pinned to the release track (e.g. if the member sync strategy doesn't track the latest object)

[clemiller]

I think this should also check from the member entry when there isn't a staged entry, otherwise the candidate vs. member diffs won't mark relationships as added since the member version