Minting in background.

[ankur2136]

The user flow right now is a bit blocking.
They have to sign the first message which uploads the file to IPFS and then sign another transaction to mint the NFT.
In between then need to wait for the upload and processing steps.

In an alternative world, how about we do the signing immediately and launch the upload and minting on a background thread. Once both completes, we pop a notification that the mint is complete. The user is technically free to leave the screen at that point and go mint something else. If something fails in between, we can put in retry logic for uploads and if there is a severe issue we could always cache the intermediate steps.