Builtin verifications

[eskimor]

Right now if a fellow wants to do due diligence quite a bit of manual work is required. What would be nice, if the ui offered decoding those double encoded values automatically and for whitelisting proposals for the ui to provide a verified link pointing to the whitelisted proposal. Right now I either verify myself via polkadot js or I am just trusting that the proposal is whitelisting what it is claiming to be whitelisting. The first is cumbersome, the latter far from ideal.

[wliyongfeng]

Let me break it down. When a referendum is to whitelist a relay chain call:

• Decode the call info and show the hash of call which will be whitelisted.
• Add a link for the referendum on relay chain.
• Show a link on polkadot subsquare related referendum to a fellowship referendum which will whitelist it.
• Show the decoded call which a fellowship referendum will whitelist.