Add alert if validators change commission rate

[JasonBonnici]

It would be a good idea to have some type of alert in an event where validator change their commission rate from the one agreed upon when employing restake.app.

Supporting info: https://www.reddit.com/r/CosmosAirdrops/comments/wfgn9g/to_those_using_restakeapp/?utm_source=share&utm_medium=ios_app&utm_name=iossmf

[tombeynon]

Thanks for the suggestion, I like this idea and will consider it for the future.