Limit order limit pairs to same chain only

[gomesalexandre]

Overview

Hot take from @0xean user testing in https://discord.com/channels/554694662431178782/1318827210483699762/1319407440470741114

Since cross chain isn't supported would be really nice to have the chain selectors locked to the same chain, or get rid of the second one entirely. Seems like bad UX to have dropdowns that guarantee a user will end up in an error state

References and additional details

N/A

Acceptance Criteria

• Limit users are unable to get into an invalid cross-chain pair

Need By Date

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Screenshots/Mockups

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Estimated effort

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