[mobile] should add save to photot feature if we open image

[moonrailgun]

[mobile] should add save to photot feature if we open image

[shenjackyuanjie]

网页端同理
消息添加右键菜单之后 成功把保存图片的右键菜单吞掉了（

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Same as the web page
After adding the right-click menu to the message, the right-click menu of the saved picture was successfully swallowed (

[Github-DHEnry]

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[moonrailgun]

消息添加右键菜单之后 成功把保存图片的右键菜单吞掉了（

already fixed in nightly service