Refactor balances.ts to make use of DenomMetadata and ValueView

[grod220]

• The extension and frontend code should be making use of the DenomMetadata at all times. For instance, the assets list makes use of an AssetBalance, which has an ad-hoc subset of different parts of the DenomMetadata, plus an amount. But we already have a way to represent a typed amount (Value) and a way to attach metadata to that typed amount (ValueView).
• Values should be rendered using standardized components that take a ValueView, rather than having custom rendering in different places (similarly to how we have a standardized AddressView component)
• Values should use the ticker symbols defined in the DenomMetadata.
• Do a search for fromBaseUnitAmount. Should find a view examples of where ValueView should replace.
• Support DenomMetadataByIdRequest #429

Will affect things downstream (swap/send/ibc). Ensure those are not formatting their own values but using ValueView.