Transactions shows wrong scan link

[Cal-L]

Description

Transactions shows wrong scan link

Video of issue - https://recordit.co/oZ9pNjXmfK

Steps to reproduce from @chrisleewilcox :

• After new install add Avalanche network using add popular networks
• Execute swap on Avalanche
• Add Binance network using add popular networks
• Execute swap on Binance
• The transactions will show view history on Avalanche in Activity > Transactions (This is where the scan link shows the wrong chain - Reference video)

Technical Details

• The issue is most likely located in components/UI/Transactions/index.js since both Asset and Activity flows use this components + the issue has been seen in both places.
• More specifically - It might be related to storing this.state.rpcBlockExplorer in state and/or being a class component.
• A refactor to functional component is highly recommended and would be a good place to start.

Acceptance Criteria

• Transactions from Assets and Activity should both show correct scan links

Scenario: xxxx

• GIVEN a user is in x state
• WHEN a user does x
• AND a user does x
• THEN x should occur