更新了某些文本 让提示更加友好

根据scuxiatian提供的方案 修改了workflow前端组件的一些bug

web/src/components/gva-wfd/behavior/dragPanelItemAddNode.js

@@ -121,6 +121,7 @@ export default function(G6){
         //type、shape属性同时存在即兼容之前版本的数据，又兼容g6的升级
         addModel.type = getShapeName(clazz);
         addModel.shape = getShapeName(clazz);
+        addModel.hideIcon = false;
         const timestamp = new Date().getTime();
         const id = clazz + timestamp;
         const x = p.x;

web/src/components/gva-wfd/components/Wfd.vue

@@ -150,6 +150,10 @@
             this.selectedModel = this.processModel;
           }
         });
+         this.graph.on('aftercommandexecute',(command)=>{
+          if (command.name !== 'undo' && command.name !== 'redo') return;
+            // 更新selectedModel
+         });
         const page = this.$refs['canvas'];
         const graph = this.graph;
         const height = this.height-1;