fix(sbb-calendar): calendar animation glitch

[MarioCastigliano]

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• I have read the Contributing Guidelines for this project.
• I agree to follow the Code of Conduct that this project adheres to.
• I have searched the pull request tracker for a Pull Request (PR) that matches the one I want to submit, without success.

Issue

This PR Closes #1824

Pull request checklist

Please check if your PR fulfills the following requirements:

• Tests for the changes have been added (for bug fixes / features)
• Docs have been reviewed and added / updated if needed (for bug fixes / features)

See Review Guidelines for more information what is checked during review process.

Changes

Changes in this pull request:

Browsers

I tested the build on the following browsers:

• Firefox Desktop
• Chrome Desktop
• Edge Desktop
• Safari Desktop
• Chrome Mobile
• Safari Mobile

Screen readers

I tested the build on the following browsers:

• JAWS Firefox Desktop
• JAWS Chrome Desktop
• NVDA Firefox Desktop
• NVDA Chrome Desktop
• VoiceOver Safari Desktop
• VoiceOver Chrome Desktop
• VoiceOver Safari Mobile
• Android Accessibility Suite Chrome Mobile

Pull request type

Please check the type of change your PR introduces:

• Bugfix
• Feature
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe):

Does this introduce a breaking change?

• Yes
• No

Other information

[codecov-commenter]

Codecov Report

Merging #1840 (c110901) into master (ab917b0) will decrease coverage by 17.27%.
The diff coverage is 34.54%.

❗ Current head c110901 differs from pull request most recent head 2c7de5b. Consider uploading reports for the commit 2c7de5b to get more accurate results

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@@             Coverage Diff             @@
##           master    #1840       +/-   ##
===========================================
- Coverage   54.85%   37.58%   -17.27%     
===========================================
  Files          49      257      +208     
  Lines        1659     9777     +8118     
  Branches      406     2101     +1695     
===========================================
+ Hits          910     3675     +2765     
- Misses        671     5834     +5163     
- Partials       78      268      +190     

Impacted Files	Coverage Δ
...ts/sbb-accordion-item/sbb-accordion-item.events.ts	100.00% <ø> (ø)
.../sbb-accordion-item/sbb-accordion-item.stories.tsx	0.00% <0.00%> (ø)
...mponents/sbb-accordion-item/sbb-accordion-item.tsx	0.00% <0.00%> (-37.21%)	⬇️
...components/sbb-accordion/sbb-accordion.stories.tsx	0.00% <0.00%> (ø)
...ents/sbb-action-group/sbb-action-group.stories.tsx	0.00% <0.00%> (ø)
...onents/sbb-alert-group/sbb-alert-group.stories.tsx	0.00% <0.00%> (ø)
src/components/sbb-alert/sbb-alert.stories.tsx	0.00% <0.00%> (ø)
...onents/sbb-autocomplete/sbb-autocomplete.events.ts	100.00% <ø> (ø)
...ents/sbb-autocomplete/sbb-autocomplete.stories.tsx	0.00% <0.00%> (ø)
src/components/sbb-button/sbb-button.stories.tsx	0.00% <0.00%> (ø)
... and 58 more

... and 201 files with indirect coverage changes

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[jeripeierSBB]

LGTM