Media: only add required attribute to media_upload_form on media screen

Author: adamsilverstein

src/wp-admin/includes/media.php

@@ -2276,7 +2276,7 @@ function media_upload_form( $errors = null ) {
 	 * @since 2.6.0
 	 */
 	do_action( 'pre-html-upload-ui' ); // phpcs:ignore WordPress.NamingConventions.ValidHookName.UseUnderscores
-
+	$required = 'media' === get_current_screen()->id ? ' required' : '';
 	?>
 	<p id="async-upload-wrap">
 		<label class="screen-reader-text" for="async-upload">
@@ -2285,7 +2285,7 @@ function media_upload_form( $errors = null ) {
 			_ex( 'Upload', 'verb' );
 			?>
 		</label>
-		<input type="file" name="async-upload" id="async-upload" required />
+		<input type="file" name="async-upload" id="async-upload"<?php echo $required; ?>/>
 		<?php submit_button( _x( 'Upload', 'verb' ), 'primary', 'html-upload', false ); ?>
 		<a href="#" onclick="try{top.tb_remove();}catch(e){}; return false;"><?php _e( 'Cancel' ); ?></a>
 	</p>