Entity Sign: Improve Firefox visibility and add focus support #20733
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Fixes #20687
Summary
This PR updates the positioning logic for the Entity Sign bundle to ensure that sign icons are visible in Firefox.
Previously, due to the use of position-anchor (not supported in Firefox), the entire element was clipped and signs were not visible.
Changes
Result
Signs are now visible across all browsers.
Improved accessibility via keyboard focus interaction.
Note: In Firefox, hover/focus dropdowns are still not available due to Shadow DOM interaction issues.