fix 修复默认关闭时可能会关闭不可关闭窗口的问题

Web/src/views/main/index.vue

@@ -144,7 +144,7 @@ export default {
 
     onCloseContentWindow(key) {
       key = key || this.tabActived;
-      const i = this.$_.findIndex(this.panes, (p) => p.key === key);
+      const i = this.$_.findIndex(this.panes, (p) => p.key === key && p.closable);
       this.panes.splice(i, 1);
 
       if (this.panes.length) {