[5.4] Passwort reset request: fix legend

[chmst]

Pull Request for Issue #46446 .
Replaces #46451

Summary of Changes

This PR sepaprates Legend of the fieldset and label of a field in all pages for password reset. (request, confirm, complete)

Testing Instructions

I a frontend login form click the "forgot password" link.

Actual result BEFORE applying this Pull Request

The label of the fieldset is used for a legend. If there is no label, there would not be a legend at all, which is an a11y issue.
A legend is not an instruction but summarises the content of a fieldset.
This PR adds a legend for the fieldset, if there is a label or not.

### Expected result AFTER applying this Pull Request

Note:
If this is accepted, same change is needed for similiar pages in the users component.

Link to documentations

Please select:

• Documentation link for docs.joomla.org:

• No documentation changes for docs.joomla.org needed

• Pull Request link for manual.joomla.org:

• No documentation changes for manual.joomla.org needed

[Sieger66]

Same can you do at:
https://github.com/joomla/joomla-cms/blob/5.4.0/components/com_users/tmpl/remind/default.php#L35-L37
https://github.com/joomla/joomla-cms/blob/5.4.0/components/com_users/forms/remind.xml#L7
for the Login reminder page.

[Kostelano]

I have tested this item ✅ successfully on 0510135

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[hans2103]

I have tested this item ✅ successfully on 0510135

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_{This comment was created with the J!Tracker Application at issues.joomla.org/tracker/joomla-cms/46454.}

[richard67]

Hmm, as we have only one fieldset, this code works. But we are in a loop over fieldsets here, so as soon as someone adds a new fieldset to the form, this will be a problem as the legend and text are always the same.

Would there be a better solution for this?

Or do we already do it elsewhere in the same way, having a loop over fieldsets and in that loop code using the same language strings?

No idea if it is really a problem.

[richard67]

RTC

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