Fix: 运行app时，不使用未安装的依赖

app/apps.service.ts

@@ -127,8 +127,10 @@ export class AppsService {
         let args: string[] = [];
         let env = {};
         for (let child of children) {
+            if(child.isInstalled()) {
                 action = child.actions.get('main');
             }
+        }
         let execute = path.join(cwd, action.execute);
         if (action.open) {
             let openAction = action.open.actions.get('main');