Summary: Ref T5835. This is still completely made up (no payment integration), but you can "back" an initiative, type a number in the box, and generate a database row. You can then seach for backers and things you've backed and such. Notable changes: - Renamed "FundBacking" to "FundBacker". The former name was sort of because you can back things multiple times, but stuff like `$backings` was just too weird. - I think that's it? Test Plan: - Backed an initiative. - Viewed that I became a backer. Reviewers: btrahan Reviewed By: btrahan Subscribers: epriestley Maniphest Tasks: T5835 Differential Revision: https://secure.phabricator.com/D10486