[ACA-3266] Improve version upload component

[ursedaniel]

Please check if the PR fulfills these requirements

• The commit message follows our guidelines
• Tests for the changes have been added (for bug fixes / features)
• Docs have been added / updated (for bug fixes / features)

What kind of change does this PR introduce? (check one with "x")

• Bugfix
• Feature
• Code style update (formatting, local variables)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation
• Other... Please describe:

What is the current behaviour? (You can also link to an open issue here)
https://issues.alfresco.com/jira/browse/ACA-3266

What is the new behaviour?

I can see a comparison between the current node version and the new one after the drag&drop action.

Does this PR introduce a breaking change? (check one with "x")

• Yes
• No

If this PR contains a breaking change, please describe the impact and migration path for existing applications: ...

Other information:

[codecov-commenter]

Codecov Report

Merging #5750 into develop will increase coverage by 2.35%.
The diff coverage is 80.00%.

@@             Coverage Diff             @@
##           develop    #5750      +/-   ##
===========================================
+ Coverage    83.76%   86.11%   +2.35%     
===========================================
  Files          943      174     -769     
  Lines        26796     5280   -21516     
  Branches      3770      748    -3022     
===========================================
- Hits         22446     4547   -17899     
+ Misses        3225      502    -2723     
+ Partials      1125      231     -894     

Impacted Files	Coverage Δ
...c/lib/version-manager/version-manager.component.ts	75.55% <50.00%> (-3.94%)	⬇️
...ib/version-manager/version-comparison.component.ts	100.00% <100.00%> (ø)
.../src/lib/version-manager/version-manager.module.ts	100.00% <100.00%> (ø)
...ib/document-list/services/document-list.service.ts	79.36% <0.00%> (-1.59%)	⬇️
...templates/empty-content/empty-content.component.ts
.../src/lib/process/services/process-cloud.service.ts
lib/core/services/comment-content.service.ts
...ts/src/lib/diagram/components/diagram.component.ts
...server-settings/about-server-settings.component.ts
lib/core/services/log.service.ts
... and 765 more

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