WV-659 PoliticianDetailsPage: VoterPositionEntryAndDisplay on a Ballot Item & WV-485 PoliticianDetailsPage animate fixed header when in mobile mode & WV-862 Democracy Challenges Cards: Adjust to be 250px wide[Team Review/ Merge Ready]

WV-659 PoliticianDetailsPage: VoterPositionEntryAndDisplay on a Ballot Item & WV-485 PoliticianDetailsPage animate fixed header when in mobile mode & WV-862 Democracy Challenges Cards: Adjust to be 250px wide[Team Review/ Merge Ready] #1089