fix pasteNode

render-process/Editor/index.tsx

@@ -366,6 +366,7 @@ export default class Editor extends React.Component<EditorProps, EditorState> {
             if (!str || str == "") {
                 return;
             }
+            this.onSelectNode(null);
             const data = JSON.parse(str);
             if (!curNodeData.children) {
                 curNodeData.children = [];

render-process/TreeTabs.tsx

@@ -68,8 +68,10 @@ export default class TreeTabs extends Component<TreeTabsProps, TreeTabsState> {
         const trees: BehaviorTreeModel[] = []
         for (let k in this.editors) {
             let editor = this.editors[k];
+            if(editor) {
                 trees.push(editor.save());
             }
+        }
         return trees;
     }
 
@@ -107,6 +109,7 @@ export default class TreeTabs extends Component<TreeTabsProps, TreeTabsState> {
         if (!curPath) {
             return <div />;
         }
+        this.editors = {};
         return (
             <Tabs
                 hideAdd