WIP: Block gas limit display

[schmanu]

This is still work in progress.

I wanna build a new component to display a good gas estimation and the percentage used in the network's block gas limit.

Here is a gif of the current component. I'm very happy with it so far.

Resources used so far:

• https://help.gnosis-safe.io/en/articles/4933491-gas-estimation
• very rough estimations for the Safe tx execution part of the estimation
• waiting on reply on this question: https://ethereum.stackexchange.com/questions/121785/gas-estimation-fails-on-gnosis-safe-transaction-service-api-gnosis-chain