Fix tab container logic bug

[reecebrowne]

Description of Changes

Please provide a summary of the changes, including:

Overhauled logic for tab-containers on sign page to fix compatibility issues with new Tooltip system

Closes #(2839)

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Checklist

General

• [x ] I have read the Contribution Guidelines
• [ x] I have read the Stirling-PDF Developer Guide (if applicable)
• [ x] I have read the How to add new languages to Stirling-PDF (if applicable)
• [ x] I have performed a self-review of my own code
• [x ] My changes generate no new warnings

Documentation

• [ x] I have updated relevant docs on Stirling-PDF's doc repo (if functionality has heavily changed)
• [ x] I have read the section Add New Translation Tags (for new translation tags only)

UI Changes (if applicable)

• [ x] Screenshots or videos demonstrating the UI changes are attached (e.g., as comments or direct attachments in the PR)

Testing (if applicable)

• [ x] I have tested my changes locally. Refer to the Testing Guide for more details.