Inputs added to the DOM by FileUpload never removed

[lleprieur]

Describe the bug
A component inheriting FileUpload creates a hidden input in the DOM each time the page is loaded. It doesn't cause performance issue or any problems but it floods the DOM with numerous elements which shouldn’t exist.

To Reproduce
If one would like to reproduce the error, he would need a GWT client app with a form using FileUpload class.

1. Load the page with chrome dev tools opened to the HTML code
2. Reload the page by navigating to it (link to the page for example)
3. See the DOM being filled by unexpected inputs

Expected behavior
No more input should be added to the DOM

Screenshots

Method from the class FileUpload being called on super()

Desktop (please complete the following information):

• OS: Mac OS Monterey 12.6
• Browser Chrome 108.0.5359.124
• Version domino-ui-shared-1.0.0-RC13