Revert routing changes in 3.8.4

[csthomas]

Pull Request for Issue #19504

Summary of Changes

Because I am responsible for this, I feel that I have to prepare a reverse PR.

I'm not a fan of this PR but I won't insist to stay without reversion.

Each of reverted PRs are connected each other.

1. Revert URL changes.
2. Revert changes in language filter.

Expected result

The same as on 3.8.3

Actual result

New structured URLs.

[infograf768]

Works fine. Evidently, #15730 is still an issue if no login form menu item is present.

[cavo789]

I have tested this item ✅ successfully on 335100c

It was impossible anymore to log in on the frontend on my multilingual website; ERR_INVALID_REDIRECT just after the submission of the log in screen. With #19512 applied, problem solved. Thanks

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/19512.}

[infograf768]

I have tested this item ✅ successfully on 335100c

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/19512.}

[infograf768]

@mbabker to decide

[mbabker]

Will look later when back from travel.

Because I am responsible for this, I feel that I have to prepare a reverse PR.

As the saying goes, stuff happens. Nobody's blaming you.

[infograf768]

I have created a PR to, at least, inform users of the necessity to create a login form when Home is set to registered. #19535

[csthomas]

As the saying goes, stuff happens. Nobody's blaming you.

Thanks

[tonypartridge]

Good work, your not to blame. You PR was valid, the issue is the lack of people testing the 3.8.4 release.

[ghost]

Ready to Commit after two successful tests.

[LukeDouglas2]

Installed 3.8.5 on 67 websites and everything seems fine. Great work.

I wanted to compliment the development team on the work since Joomla 3 was released. Along with the Gantry Framework team, you have cut my maintenance time by at least 10% on websites. That's extra time for the golf course. :)