added bullet point on wallet fees transparency

[nguyener1]

See #536 for a discussion of changes.

Made a copy edit that combines both suggestions in the issue tracker.

[GBKS]

Great tweak, thank you for submitting.

Only addition I could think of is the term "pro-active". It's the worst when fees are hidden in small text somewhere or they tell you too late and you wouldn't have take your current course of action if you had known about fees earlier.

[pavlenex]

@GBKS Good point about pro-active and transparent fee display.
Any page suggestion where this can be added?
I think it that can be added to a mockup/image rather than the principles section? If so, we can merge this and add a note to add a bit more regarding pro-active fee display.

[Bosch-0]

I think it that can be added to a mockup/image rather than the principles section?

Agree with this, we haven't given examples to other sections of the principles page, why give one here? Better to apply those principles in context. For example in the Funding a wallet page I am working on I have a few pointers about fee transparency.

[pavlenex]

In that case, I'll go ahead and merge this one and we'll proceed with adding this in the funding a wallet, @Bosch-0 <3