Pass Custom Proposal Types to Proposal Details

[earth2travis]

Need to figure out how to pass custom proposal types to pro details/cards to display the custom types

[earth2travis]

@skuhlmann here are the results of testing:

INIT_VOTE

• [x] Initial Vote title should be Signal Proposal on overview
• [x] Initial Vote title should be Signal Proposal on proposal details

BECOME_PARTNER

• [x] Token Proposal title should be Partner Proposal on overview
• [x] Token Proposal title should be Partner Proposal on proposal details

ADD_PARTNER

• [x] Token Proposal title should be Partner Proposal on overview
• [x] Token Proposal title should be Partner Proposal on proposal details