--- a/wp/wp-includes/js/plupload/handlers.js	Tue Jun 09 11:14:17 2015 +0000
+++ b/wp/wp-includes/js/plupload/handlers.js	Mon Oct 14 17:39:30 2019 +0200
@@ -285,7 +285,7 @@
 			wpFileError(fileObj, pluploadL10n.upload_failed);
 			break;
 		case plupload.FILE_EXTENSION_ERROR:
-			wpFileError(fileObj, pluploadL10n.invalid_filetype);
+			wpFileExtensionError( uploader, fileObj, pluploadL10n.invalid_filetype );
 			break;
 		case plupload.FILE_SIZE_ERROR:
 			uploadSizeError(uploader, fileObj);
@@ -328,14 +328,28 @@
 	}
 }
 
-function uploadSizeError( up, file, over100mb ) {
-	var message;
+function uploadSizeError( up, file ) {
+	var message, errorDiv;
+
+	message = pluploadL10n.file_exceeds_size_limit.replace('%s', file.name);
 
-	if ( over100mb )
-		message = pluploadL10n.big_upload_queued.replace('%s', file.name) + ' ' + pluploadL10n.big_upload_failed.replace('%1$s', '<a class="uploader-html" href="#">').replace('%2$s', '</a>');
-	else
-		message = pluploadL10n.file_exceeds_size_limit.replace('%s', file.name);
+	// Construct the error div.
+	errorDiv = jQuery( '<div />' )
+		.attr( {
+			'id':    'media-item-' + file.id,
+			'class': 'media-item error'
+		} )
+		.append(
+			jQuery( '<p />' )
+				.text( message )
+		);
 
+	// Append the error.
+	jQuery('#media-items').append( errorDiv );
+	up.removeFile(file);
+}
+
+function wpFileExtensionError( up, file, message ) {
 	jQuery('#media-items').append('<div id="media-item-' + file.id + '" class="media-item error"><p>' + message + '</p></div>');
 	up.removeFile(file);
 }
@@ -430,14 +444,14 @@
 
 			if ( up.features.dragdrop && ! $(document.body).hasClass('mobile') ) {
 				uploaddiv.addClass('drag-drop');
-				$('#drag-drop-area').bind('dragover.wp-uploader', function(){ // dragenter doesn't fire right :(
+				$('#drag-drop-area').on('dragover.wp-uploader', function(){ // dragenter doesn't fire right :(
 					uploaddiv.addClass('drag-over');
-				}).bind('dragleave.wp-uploader, drop.wp-uploader', function(){
+				}).on('dragleave.wp-uploader, drop.wp-uploader', function(){
 					uploaddiv.removeClass('drag-over');
 				});
 			} else {
 				uploaddiv.removeClass('drag-drop');
-				$('#drag-drop-area').unbind('.wp-uploader');
+				$('#drag-drop-area').off('.wp-uploader');
 			}
 
 			if ( up.runtime === 'html4' ) {
@@ -445,6 +459,10 @@
 			}
 		});
 
+		uploader.bind( 'postinit', function( up ) {
+			up.refresh();
+		});
+
 		uploader.init();
 
 		uploader.bind('FilesAdded', function( up, files ) {