Optimize the Preview function of multi-signature transactions

[Yakio]

After clicking approve (and selecting the signing account), the transaction information is confirmed in the form of a dialog.

Text：
Mulitsig Transaction Details
多签交易详情

Please be sure to double-check the mulitsig transaction progress and parameters carefully before approving.
在批准前，请务必仔细检查多签交易进度和参数。