Revisit the flow of adding a group

[mebreuer]

From DC field test:

• "If groups (2+) were congregating and chatting, it was difficult to document the gender and age of each person in the group. Might be easier to select the number of people first (1, 2, 3-7, 8+) and then answer the prompts for each individual in the group rather than create multiple entries."
• "Like the duplicate feature. Would have liked a swipe option to scroll through “persons.”
• "...Also there needs to be a way to better catalog groups with multiple ages."