Allow paying shielded transfer with shielded or transp balance

[euharrison]

[Rigorously]

In which scenario would one want to / have to give up data protection to pay gas? The transparent gas payment method should perhaps not even be an option, as it might be accidentally enabled with possibly catastrophic consequences. Also, every decision is a mental drain, so for better UX all superfluous options should be avoided.

See also: anoma/namada#3964

[euharrison]

This is the idea that we are following: "Give users the power, but guide them as best we can".

We are also trying to mimic the cli capabilities, then, in case the anoma/namada#3964 block this feature, we'll do on Namadillo as well