[IMPROVEMENT] - Apply Test network prefix to token values to help educate users

[sethkfman]

Description

This ticket is for UI improvements to the way we display ETH on testnets. We are prefixing the ETH ticker with the specific testnet.

Screenshots/Recordings

https://user-images.githubusercontent.com/10342624/182242497-c83924b8-e38b-4f04-9178-9c5cefc54d05.mp4

Checklist

• [X] There is a related GitHub issue
• [X] Tests are included if applicable
• [X] Any added code is fully documented

[github-actions[bot]]

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10 out of 11 committers have signed the CLA. :white_check_mark: @sethkfman :white_check_mark: @Fatxx :white_check_mark: @georgewrmarshall :white_check_mark: @AkshayBhimani :white_check_mark: @tommasini :white_check_mark: @blackdevelopa :white_check_mark: @chrisleewilcox :white_check_mark: @bentobox19 :white_check_mark: @Cal-L :white_check_mark: @jpcloureiro :x: @Seth Kaufman

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[sethkfman]

I have read the CLA Document and I hereby sign the CLA

[chrisleewilcox]

CW1: Blockexplorer scan link on test networks show 'undefined'

Activity > scroll to bottom > link "View full history on undefined" Token view > scroll to bottomw > link "View full history on undefined"

UPDATE: this was caused by 4780 and a fix will be provided.

[chrisleewilcox]

~CW2: Some screens that still show fiat balance...~

• Wallet view
• Left nav under account
• Token view

Based on the original issue the expectation is that we will not show fiat balance or zero for fiat balance on test networks. Recording of Send flow on Goerli test network.

Recording of Receive flow on Goerli test network.

UPDATE: it was mentioned above for these views that they will show the fiat balance for now. Will address in future.