Display stake transactions with more information and linking

[alexlyp]

Currently there to no clear way of connecting a ticket and the vote or revocation it corresponds with.

Add the feature to now check a ticket for it being spent or not, then add a link to that if so.

[alexlyp]

Link from votes/revokes to corresponding ticket added in #25

Going to now attempt to go from ticket to vote which is a bit less trivial.

Hopefully with the use of searchrawtransaction rpc we can find any matches of the ticket's address that will be used for any vote/revoke for commit address vout. May have to do dcrd rpc surgery to make this possible.

[alexlyp]

Due to searchrawtransactions not properly returning expected transactions, the other portion of this issue will not be completed for 0.5.0

There has been discussions of creating a new rpc call that allows people to see any related ssgen/ssrtx based on a sstx id. But this would requiring adding additional relational database infrastructure, which is out of scope at the current moment.

I will be leaving this issue open, but it will be considered a future enhancement