Merge pull request #767 in BA/design from ~JU/ba-dev-design:dev to dev

* commit '2d53d781b620a0e0aaf867012adb1da7da621e14':
  无JIRA任务 添加插件卸载前监听，性能插件以此进行额外的卸载任务

designer_base/src/com/fr/design/extra/PluginHelper.java

@@ -319,6 +319,8 @@ public class PluginHelper {
         if (plugin == null || env == null) {
             return ArrayUtils.EMPTY_STRING_ARRAY;
         }
+        //卸载前监听
+        plugin.preUninstall();
         PluginLoader.getLoader().deletePlugin(plugin);
         return env.deleteFileFromPluginAndLibFolder(plugin);
     }