Politeia: Migrate to new API.

[amass01]

Closes #3391.

Note: The new API supports paginated vote inventory calls, I decided to keep the pagination work to a separate
future PR to try maintain incermental easily reviewable PRs.

Testing against local PI

To run against local PI instance add the following commented out code:

• https://github.com/decred/decrediton/blob/master/app/main_dev/externalRequests.js#L52-L62
• https://github.com/decred/decrediton/blob/master/app/middleware/politeiaapi.js#L6

[matheusd]

Is the testnet Pi instance already updated and sufficient to test this or do we still need to run a local instance to test?

[amass01]

hrmm looks like https://test-proposals.decred.org got some test data on it, maybe we can start vote on a proposal to test voting as well.

cc: @alexlyp @lukebp

[lukebp]

Started one.

https://test-proposals.decred.org/record/a54461c

[matheusd]

Got a "type error: cannot read property length of undefined" when loading the proposal on discussion in testnet (error page is looking nice, btw).

Accessing the proposal that is currently voting also occasionally fails. If I go to the "Finished Voting" tab, open a proposal, then go back to the "Voting" tab, the proposal opens. But if I then go to the "In Discussion" tab, try to open the proposal (this fails) and go back to the "Voting" tab, the under voting proposal will now not open.

I purchased tickets but I guess I didnt purchase them fast enough to be able to cast a vote on the prop, so I didnt test that.

[amass01]

@matheusd Fixed the in discussion edge case you were hitting. tested navigating to voting after visiting in discussion
and looks like it's working now as well.

will be looking into the other issue with the voting prop.

[amass01]

@matheusd all set for another round of review.

@lukebp I have also missed the voting on last proposal you created, bought dozen of
tickets and they should be eligible to vote at the moment, could you please start a vote on another proposal ?

[amass01]

Just noticed that by default author username isn't displayed when proposals list is loaded,
it shows up only when user clicks on a proposal to see it's details.

[amass01]

Just noticed that by default author username isn't displayed when proposals list is loaded,
it shows up only when user clicks on a proposal to see it's details.

Fixed.

[matheusd]

Working fine (minus voting in active proposal which I couldn't test)