Cannot paste amount on invoice creation

[f321x]

Some Wallets support pasting the amount you want to create an invoice for in the invoice creation form. This is helpful and makes invoice creation more pleasant. E.g. you copy the amount "124318" sat from robosats to create an invoice for it, currently you have to enter the number manually in Mutiny. See attached video.

https://github.com/MutinyWallet/mutiny-web/assets/51097237/62b816f3-8c2a-45e4-aa3d-a7b70de63331