能否支持对已有存储的全选删除

[muyiacc]

Please make sure of the following things

• [X] I have read the documentation.
• [X] I'm sure there are no duplicate issues or discussions.
• [X] I'm sure this feature is not implemented.
• [X] I'm sure it's a reasonable and popular requirement.

Description of the feature / 需求描述

我有多个不同的设备安装了alist，有时候修改是在某一个设备上进行，如果修改了已有存储后，备份恢复到其他设备，需要将其他设备上的同名存储删除后再导入，这样在我修改了多个存储后，如果已有的存储很多，需要每个设备一个一个删除，会导致大量的重复动作，能否实现一键删除已有的所有存储，再从备份恢复

Suggested solution / 实现思路

在管理-储存新增“一键删除”功能，实现上面的需求描述，并对按钮增加二次确认，防止误删除。 也可以新增批量操作按钮，添加全选功能。

Additional context / 附件

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