Fixed #15901 - re-added required indicator on text and select custom fields

[snipe]

This should fix a regression introduced in #15552 that was partially fixed in #15573.

Basically, in PR #15552, we changed the CSS to use the CSS selector instead of the CSS class for the HTML form element, however this caused inconsistencies since we were not using the required selector on every form field. I thought we had gotten them all in the PR #15573 but it looks like we missed a few.

On Edit, Before Submitting

On Edit, After Submitting

We still don't seem to be handling required checkboxes and radios correctly on the display, but I'll open a Shortcut for that.

Should fix #15901

[what-the-diff]

PR Summary

• Added 'Required' Attribute to Various Form Fields Conditionally
  This change means that certain fields in a form (like the ones where you input information on a website) will now sometimes need to be filled out, based on some criteria.

• Updated HTML Structure for Different Input Types in Form
  The code that creates different types of inputs in a form (such as checkboxes, date fields, text boxes, etc.) has been updated to better fit with the rest of the system.

• Code Readability Enhancement for Form Field Types
  Notes commenting on different parts of the code have been added for a better understanding of various field types. This will make the code easier for others to read and understand.

• Refined Form Selection Parameters
  In the form selection parameters, the 'required' attribute is now included. This means that when creating a form, there is now an option to make certain fields a requirement to be filled out.

• Extended 'Required' Attribute to Textarea, Date, and Text Fields
  The 'required' attribute, which was previously added conditionally, is now also added to textarea, date, and text input fields. This means users are required to fill these fields based on certain conditions.