[Bugfix] Fix references to element.id

[Telroshan]

This fixes #1496

Typing formElement.anything returns all inputs declaring that anything as their name, as an object or an array if there are several of them. You can observe this behaviour in this JSFiddle
This causes the mentioned issue in htmx when accessing an element's ID with a direct element.id call, as for a form, this would return all inputs using name="id"

• You can see the bugged behavior of the current htmx state in this JSFiddle provided by the issue's OP
• You can then see the behaviour you would expect with the suggested changes in this JSFiddle