Set transaction parameters manually - Advanced options

[nicosampler]

Closes #838.

Add in all the modals a section to visualize the nonce and gas info for Safe and Ethereum.
Also, allow modifying these values.

[ghost]

Travis automatic deployment:
https://pr1760--safereact.review.gnosisdev.com/rinkeby/app

[ghost]

Travis automatic deployment:
https://pr1760--safereact.review.gnosisdev.com/rinkeby/app

[Agupane]

4 - When you reject the tx it shows that it will have a nonce higher than the tx it is creating. The nonce technically is the same of the tx you are rejecting, since the MM popUp shows that nonce, but we have to show it in the review step as well

The nonce is 1 number higher and it should not be for the rejection

Metamask is receiving the correct nonce

Should be ok now @francovenica

[ghost]

Travis automatic deployment:
https://pr1760--safereact.review.gnosisdev.com/rinkeby/app

[francovenica]

Note - Issues 5 and 6 were deleted. I messed up the test giving wrong results

The issue 2 was fixed

[ghost]

Travis automatic deployment:
https://pr1760--safereact.review.gnosisdev.com/rinkeby/app

[francovenica]

7 - Modify policies tx is not having the default values in the parameters fields. The tx is being simulated, so that's not the issue.

[ghost]

Travis automatic deployment:
https://pr1760--safereact.review.gnosisdev.com/rinkeby/app

[francovenica]

Issues 1, 4 and 7 where fixed

Issue 3 is not critical. We talked how the system should simulate the tx again when you change the parameters, but we decided that includes the "warning message" feature and is too large for this ticket. It will be tackled later