fix: removing /home/ prefix from BaseLink

[stephiescastle]

Checklist

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Description

adds a filter to BaseLink to filter out the unnecessary /home/ prefix from wagtail default site urlPaths

Instructions to test

Tested in the following environments/browsers:

Operating System

• macOS
• iOS
• iPadOS
• Windows

Browser

• Chrome
• Firefox ESR
• Firefox
• Safari
• Edge