Follow-up to r68096: fix field name when blacklisting for hidden fields.
The user field ended up getting copied into the hidden fields due to wrong name in the getHiddenFields() call.
Xml::fieldset( wfMsg( 'listfiles' ) ) .
Html::openElement( 'table', array( 'id' => 'mw-listfiles-table' ) ) .
Xml::buildForm( $inputForm, 'table_pager_limit_submit' ) .
- $this->getHiddenFields( array( 'limit', 'ilsearch', 'username' ) ) .
+ $this->getHiddenFields( array( 'limit', 'ilsearch', 'user' ) ) .
Html::closeElement( 'table' ) .
Html::closeElement( 'fieldset' ) .
Html::closeElement( 'form' ) . "\n";