Feature Request: Allow Restake with Ledger

[fabianriewe]

Hey guys,
First of all, thank you for developing this amazing app. When trying it out with my Ledger, I get the following error:
The message type '/cosmos.authz.v1beta1.MsgGrant' cannot be signed using the Amino JSON sign mode because this is not supported by chain.

I have already chatted with our team internally to see how we can resolve this. Let me know if you have any ideas!