[ACA-20] Sidenav- tooltip description

[pionnegru]

PR Checklist

Please check if your PR fulfills the following requirements:

- [ ] 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
[ ] 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?

Does this PR introduce a breaking change?

[ ] Yes
[ ] No

Other information

[codecov-io]

Codecov Report

Merging #785 into development will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           development     #785   +/-   ##
============================================
  Coverage        52.84%   52.84%           
============================================
  Files              106      106           
  Lines             2916     2916           
  Branches           577      577           
============================================
  Hits              1541     1541           
  Misses            1292     1292           
  Partials            83       83

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