fix: wrong label on belongs_tofield

[adrianthedev]

Description

Fixes #1929

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

[codeclimate]

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[github-actions]

This PR has been merged into main. The functionality will be available in the next release.

Please check the release guide for more information.

[xeron]

@adrianthedev this doesn't fix the issue. ID is still different:

…
<label for="result_driver">Driver</label>
…
<select … id="result_driver_id"><option value="">Choose an option</option></select>
…

and you can still see in Chrome issues:

[xeron]

Should have been "#{id}_id" probably?

[adrianthedev]

You're right @xeron.
I refactored the code but didn't apply the fix.

I took this oportunity to also improve & slim down the JS controller.

[adrianthedev]

It'll be fixed in the next release.