Ledger Errors

The @cosmjs/ledger-amino package throws specific errors for device interactions:

Error	Cause
`"Please open the Cosmos Ledger app on your Ledger device."`	Dashboard is open instead of Cosmos app
`"Please close ... and open the Cosmos Ledger app..."`	Wrong app is open
`"Outdated version: Please update ... Ledger App..."`	Ledger app needs a firmware update
`"DANGER: The ... Ledger app is in test mode..."`	Test mode enabled on mainnet

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