Feature: display validator voting power

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Voting power (in number of tokens) is very interesting data for validator operators. Though a change in voting power is not a matter of validator performance but a very interesting event for validator profitability and sustainability, and would help to only check Tenderduty and avoid having to have lots of explorers open just to check that data.

Other tools such as panic, send alerts on stake changes in validator, and are quite useful to know the status of your validator in that regard.