Prepare for Weights v2

[KiChjang]

With paritytech/substrate#12277 merged, we now need to ensure that the frontend can display the new Weight structure appropriately.

Some extrinsics won't have migrated yet, and will continue to use a wrapper struct called OldWeight(u64).

[jacogr]

This is first - polkadot-js/api#5251 (quite a bitch since contracts need a lot of TLC to cater for old and new)

Before the above is in and available on a release, not much the UI can do. (There are significant changes UI-wise as well with mixtures of old and new and old or new. And obviously needs to cater for both current running and new master with detection and fallback)

[pepoviola]

With paritytech/substrate#12277 merged, we now need to ensure that the frontend can display the new Weight structure appropriately.

Some extrinsics won't have migrated yet, and will continue to use a wrapper struct called OldWeight(u64).

Hi @KiChjang, just for tracking purpose. This is the cause of the failure for this job: https://gitlab.parity.io/parity/mirrors/polkadot/-/jobs/1903873

Thanks!

[jacogr]

The UI itself is now robust enough (after the PRs referencing the issue) to support both chains with weight v1 and those with weight v2.

However, v2 won't work until we have had an API upgrade. (As soon as a release is cut there, aka master branch of API works, but unreleased)

[polkadot-js-bot]

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