[Bug] Inactive validators should be hidden

[michelle-aptos]

🐛 Bug Description

Currently, Explorer shows inactive validators on the validator page: https://explorer.aptoslabs.com/validators?network=mainnet

This looks only the case for previously active validators that have not properly unstaked or left the validator set. This is confusing for users because you can no longer stake to the validator.

How to reproduce

Inactive validator: 0x52b48fb6e6883d4cdf244cde8d7e972ea2d8ece9b5e484ed5085aacef0e306a1

Expected Behavior

All inactive validators should be hidden

System information

All browsers and platforms