Internal: Conversion Center - Link in Bio - Variation 7 - Feature updates

[willhowat]

PR Checklist

• The commit message follows our guidelines: https://github.com/elementor/elementor/blob/master/.github/CONTRIBUTING.md

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
• Other... Please describe:

Summary

This PR can be summarized in the following changelog entry:

• Link in Bio - updated to variation 7 for icons label colour and typography controls

Description

An explanation of what is done in this PR

• Added custom selectors to support introduction of controls

Test instructions

This PR can be tested by following these steps:

Quality assurance

• I have tested this code to the best of my abilities
• I have added unittests to verify the code works as intended
• Docs have been added / updated (for bug fixes / features)

Fixes #