Modernize Slowvote, fix Badges mobile menu
Summary: Uses modern methods in Slowvote, adds appmenu, consistent create into Badges
Test Plan: View Poll list, new poll, edit poll, vote in poll.
Reviewers: epriestley
Reviewed By: epriestley
Subscribers: Korvin
Maniphest Tasks: T9690
Differential Revision: https://secure.phabricator.com/D14592