Calculate fees for every transaction

[faboweb]

Is your feature request related to a problem? Please describe.

As a developer before implementing #2008
I want to know the fees needed for a transaction
So that I can implement the view layer.

Describe the solution you'd like

On every transaction calculate the fees (without displaying them yet).

Describe alternatives you've considered

Additional context

AC:

• calculate the fees for a transaction before a transaction
  • simulate the gas with a request to stargate
  • calculate fees in atoms
• print the calculated fees to the console

[jbibla]

nice approach