[ACA-805] about screen enhancements

[DenysVuika]

PR Checklist

Please check if your PR fulfills the following requirements:

- [x] The commit message follows our guidelines: https://github.com/Alfresco/alfresco-content-app/blob/master/CONTRIBUTING.md#commit
- [ ] Tests for the changes have been added (for bug fixes / features)
- [ ] Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

[ ] Bugfix
[x] Feature
[ ] Code style update (formatting, local variables)
[ ] Refactoring (no functional changes, no api changes)
[ ] Build related changes
[ ] CI related changes
[ ] Documentation content changes
[ ] Application / Infrastructure changes
[ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

• update to latest @alfresco/adf-extensions (new features for plugin management and metadata)
• display all loaded extensions and metadata
• i18n fixes for about screen
• rework "Dependencies" section, reduce the 1MB of data download each time

Does this PR introduce a breaking change?

[ ] Yes
[x] No

Other information

[codecov-io]

Codecov Report

❗ No coverage uploaded for pull request base (development@01ea887). Click here to learn what that means.
The diff coverage is 30.76%.

@@              Coverage Diff               @@
##             development     #813   +/-   ##
==============================================
  Coverage               ?   62.86%           
==============================================
  Files                  ?      113           
  Lines                  ?     3856           
  Branches               ?      631           
==============================================
  Hits                   ?     2424           
  Misses                 ?     1317           
  Partials               ?      115

Impacted Files	Coverage Δ
src/app/store/actions/repository.actions.ts	66.66% <ø> (ø)
src/app/store/states/app.state.ts	100% <ø> (ø)
src/app/components/about/about.component.ts	16.66% <0%> (ø)
src/app/extensions/extension.service.ts	64.07% <66.66%> (ø)

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