Administration Import upload input field is not labelled

WCAG warnings in the test class [org.xwiki.administration.test.ui.AllIT]:

Validation in the test method [testImportWhenImportAsBackupIsNotSelected]
Check for [org.xwiki.administration.test.po.ImportAdministrationSectionPage] at http://xwikiweb:8080/xwiki/bin/admin/XWiki/XWikiPreferences?editor=globaladmin&section=Import.
Found [2] items

2: Form elements must have labels
Description: Ensures every form element has a label
Help URL: https://dequeuniversity.com/rules/axe/4.6/label?application=axeAPI
Help: Form elements must have labels
Impact: critical
Tags: cat.forms, wcag2a, wcag412, section508, section508.22.n, ACT

HTML element: 
    <input class="uploadFileInput noitems" data-max-file-size="" id="xwikiuploadfile" name="filepath" type="file">
Selector: xwikiuploadfile
Fix all of the following:
  Form element has explicit <label> that is hidden