AutoFill similarity scoring does not distinguish subdomains

[keepassium]

Description
When several entries contain URLs to different subdomains of the same main domain, AutoFill does not recognize the most relevant one of them.

How to reproduce
Steps to reproduce the behavior:

1. Create a database with three entries, set their URLs respectively to https://aaa.google.com, https://accounts.google.com and https://bbb.google.com
2. Open accounts.google.com in Safari
3. Open AutoFill dialog
4. Observe that AutoFill offers the most relevant entry (https://accounts.google.com) in the second place.

Expected behavior
Entry with the most relevant subdomain should be listed first

Environment:

• Device: iPhone/Mac
• OS: any
• App Version: 2.4, 2.5

[Thanks, Michele]