Link to Block Explorer on Vault Detail Page [WEB-856]

[xgambitox]

Elevator Pitch
Add link to the block explorer of the vault address on the vault detail page.

Customer Value
Users can have an accessible link to the block explorer site in the vault detail page.

Definition of Done

• Add block explorer link icon to the vault detail page view.
• Link should open in a new tab.
• Link should open correct block explorer for the currently selected network.
  • Etherscan for Ethereum
  • Ftmscan for Fantom
• Icon should change to corresponding one of the network.

Design Approach
Add blockExplorerUrl property to NETWORK_SETTINGS on src/config/constants
Refactor VaultDetailPanels component to render icon.
Use currentNetwork on routes/VaultDetail as a new prop for VaultDetailPanels

Additional Context

Etherscan SVG here
FTMScan SVG here
Use this icon as default one for other networks we might add in the future.