Normalize the location string for a history item by removing the www. before sorting

[aekeus]

• Submitted a ticket for my issue if one did not already exist.
• Used Github auto-closing keywords in the commit message.
• Added/updated tests for this change (for new code or code which already has tests).
• Ran git rebase -i to squash commits (if needed).

Auditors: @bbondy

Test Plan:

1. Clear session file
2. Visit twitter.com once
3. Visit twilio.com once
4. Close both tabs
5. Open a new tab and enter the string 'twi'
6. Ensure www.twilio.com is the first entry (as it was visited most recently and has the same visit count value)

Fixes: #4955

[bbondy]

++