fixes https://github.com/Uniswap/uniswap-interface/issues/1800

* experimental! point at a kovan arbitrum deployment

* remove the unwrapped token from mint hook

* fix explorer links

* Etherscan -> Explorer

* move chains to constant file

* use NETWORK_URLS instead

* temporary fix to the syncing issue

* fix tests

* fix unknown chain id crash

* use a multicall that returns arbitrum block numbers

* lower polling interval for layer 2

* use a better multicall

* remove unused import

* fixed multicall2

* make some v2 code chain specific

* fix build

* line number changes

* update keys

* fix the locale parsing of full locale string

* extract

* fix lint

* add arbitrum one

* add arbitrum one to supported chains

* add missing arbitrum one label

* refactor: remove storybook

* point to the arbitrum explorer address

* fix arbitrum mainnet links

* fix how weth shows up in the interface

* make the usdc price feature more cross chain compatible

* missing translation

* clean up some governance code so it doesn't crash on unsupported networks

* improve how we check for transaction receipts for sequencer networks

* improve it a bit more

* add pool find button to v2 pool page

* update copy to be v2 specific

* fixed migrate v2 liquidity back arrow

* add missing <Trans>
Co-authored-by: Justin Domingue <judo@uniswap.org>

specifically when the google translate extension triggers it

* chore: simplify app dispatch and selector types with ts inference

* update SearchModal to use new types inference

* chore: simplify useSelector and useDispatch types using inference

* add a link to switch the locale conditionally

* make it smaller

* add the locale labels

* language labels from the internet

* fix the heart in the claim popup

* undo the conditional change

* remove todo

* updated Chinese locale name to office-365 language ids

* added missing <Trans>
Co-authored-by: Justin Domingue <judo@uniswap.org>

This would allow for direct routing from UMA tokens to June expiry UMA and UNI covered call option tokens (specifically [UMA 25 Call [30 June 2021]](https://etherscan.io/address/0xb46f57e7ce3a284d74b70447ef9352b5e5df8963) and  [UNI 50 Call [30 June 2021]](https://etherscan.io/address/0xe0360a9e2cdd7d03b9408c7d3001e017bac2ecd5)), in the same manner as the May expiry call tokens allowed.