fix #1075 (changing priority on a whole folder)

deluge/ui/web/js/Deluge.Details.Files.js

@@ -132,11 +132,19 @@ Copyright:
 						indexes[node.attributes.fileIndex] = node.attributes.priority;
 					}
 					this.getRootNode().cascade(walk);
-					
+
 					var nodes = this.getSelectionModel().getSelectedNodes();
 					Ext.each(nodes, function(node) {
-						if (Ext.isEmpty(node.attributes.fileIndex)) return;
-						indexes[node.attributes.fileIndex] = baseItem.filePriority;
+						if (!node.isLeaf()) {
+							function setPriorities(node) {
+								if (Ext.isEmpty(node.attributes.fileIndex)) return;
+								indexes[node.attributes.fileIndex] = baseItem.filePriority;
+							}
+							node.cascade(setPriorities);
+						} else if (!Ext.isEmpty(node.attributes.fileIndex)) {
+							indexes[node.attributes.fileIndex] = baseItem.filePriority;
+							return;
+						}
 					});
 					
 					var priorities = new Array(Ext.keys(indexes).length);