Implement multicall transactions on a new colony creation

[arrenv]

Description

We would like to incorporate the new multicall functionality available on the latest v11 of the contracts into the DApp with the next deployment. First off, we would like to implement this when creating a colony by reducing the required number of transactions.

Implementation

In the case where you are creating a new colony with a new token (screenshot below) you can do the transactions Create Token, Create Colony, and Deploy Token Authority into a (new) function called createColonyForFrontend. Then setTokenAuthority and setTokenOwner can be combined with multicall. The Add extension transaction remains its own, but the two giving permissions to the extension can be combined into one with multicall. This should result in 4 total transactions, down from the 8 as shown.

End result:

• 1: Create new Colony
• 2: Setup Colony's native token
• 3: Add payment extension to Colony
• 4: Setup permissions for payment extension

One thing to note for the extension steps, is that the last two need the address of the extension which is only available after the extension contract has been created.

For other combinations of colony creation transactions, the same logic can be applied i.e. to determine what can be combined through the contracts, it is wherever methods are in the same contract file, with the additional requirement that if the function ends up doing something that's needed for a second call, then they cannot be combined.

Bonus points

Look into other actions where multiple transactions are required and implement multicall there as well.