[NODE] Replace "ETH balance" by "Native token balance" ?

[aelmanaa]

Description A node operator can the node balance on the node operator UI <base_url>/keys. in non Ethereum chains , one can see "ETH Balance". This is what I see on Polygon Mumbai

Actually, to be precise my node has 0,2 MATIC and not 0,2 ETH.

Basic Information

• Network: Polygon (I guess it could happen on any non Ethereum chain)
• Node version: 1.1.0 (SHA 9be337bbdc3365cc631b847d86fc3f9ff7342368)

Steps to Reproduce

• Start a node
• Connect it to a non Ethereum chain (e.g.: Polygon Matic)

Additional Information Not critical issue but would be more user friendly to display the right native token or at least something generic like Native token balance