properly fix folder upload to use delegatedEvent

apps/files/js/filelist.js

@@ -2514,12 +2514,13 @@
 			var self = this;
 
 			// handle upload events
-			var fileUploadStart = this.$el.find('#file_upload_start');
+			var fileUploadStart = this.$el;
+			var delegatedElement = '#file_upload_start';
 
 			// detect the progress bar resize
 			fileUploadStart.on('resized', this._onResize);
 
-			fileUploadStart.on('fileuploaddrop', function(e, data) {
+			fileUploadStart.on('fileuploaddrop', delegatedElement, function(e, data) {
 				OC.Upload.log('filelist handle fileuploaddrop', e, data);
 
 				if (self.$el.hasClass('hidden')) {
@@ -2527,7 +2528,10 @@
 					return false;
 				}
 
-				var dropTarget = $(e.originalEvent.target);
+				console.log(e);
+				var dropTarget = $(e.delegatedEvent.target);
+				console.log(dropTarget);
+
 				// check if dropped inside this container and not another one
 				if (dropTarget.length
 					&& !self.$el.is(dropTarget) // dropped on list directly

apps/files/js/jquery.fileupload.js

@@ -1267,7 +1267,11 @@
                 e.preventDefault();
                 this._getDroppedFiles(dataTransfer).always(function (files) {
                     data.files = files;
-                    if (that._trigger('drop', e, data) !== false) {
+                    if (that._trigger(
+                            'drop',
+                            $.Event('drop', {delegatedEvent: e}),
+                            data
+                        ) !== false) {
                         that._onAdd(e, data);
                     }
                 });