removed deps react-stickup and added class sticky-top

[sabato-galasso]

Fixes #1075

PR Checklist

• My branch is up-to-date with the Upstream main branch.
• The unit tests pass locally with my changes (if applicable).
• I have added tests that prove my fix is effective or that my feature works (if applicable).
• I have added necessary documentation (if appropriate).

Short description of what this resolves:

removed deps react-stickup and added class sticky-top

Changes proposed in this Pull Request:

Fixed old deps react-stickup

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