Elements List: Don't remove the label of a filled spin button input field (#12317)

[JulienCochuyt]

Link to issue number:

Fixes #12317
Fix-up of PR #6131

Summary of the issue:

In browse mode documents, when a spin button input field is filled with a value, its label goes missing from the Elements List dialog.

Description of how this pull request fixes the issue:

Remove the role ROLE_SPINBUTTON from the set of exceptions for which the content replaces the label.

Testing strategy:

In Firefox / Chrome / Edge Chromium:
Ensure the label is present with empty spin button input field.
Ensure the label is present with non-empty spin button input field.

Known issues with pull request:

There might be other roles for which both the label and content are desirable.
For the record, remaining exceptions as of this PR are:

• ROLE_BUTTON
• ROLE_DROPDOWNBUTTON
• ROLE_TOGGLEBUTTON
• ROLE_SPLITBUTTON
• ROLE_MENUBUTTON
• ROLE_DROPDOWNBUTTONGRID
• ROLE_TREEVIEWBUTTON

Change log entries:

I do not think this small fix deserves a change log entry.

Code Review Checklist:

• Pull Request description is up to date.
• Unit tests.
• System (end to end) tests.
• Manual tests.
• User Documentation.
• Change log entry.
• Context sensitive help for GUI changes.

[seanbudd]

lgtm, thanks @JulienCochuyt