Improve FE communication WRT to Voter Boost deadline.

[idiom-bytes]

Problem:

It's hard for users to understand the deadline for BrightID and Voter Boosts.

DoD:

• [ ] FE or Wiki is communicating deadlines.
• [ ] #186
• [ ] Users can more easily understand they need to complete their registration by the Voting Start Date, in order to receive their voting boost.

[malvonme]

@idiom on DoD #1, let's think about which 1 page can/will/should become our 1 hero-go-to-page for (1st time) voters over the coming weeks.

Same time: let's try to keep the touchpoint as clean as possible, (in line w/ Norberts design/style).