Add Month/Year select(s) to Home Profile Activities section

As a manager, I would like to be able to answer the following questions:

- Who has been active with our residents in a given Month and Group Home?
- What are the counts of activities by type in a given Month and Group Home?

# Task
Add a month/year selection to the Home Profile in the Activities section. When a month/year combination is selected, update the Home Activities charts with data from that period. The query should default to the current month, rather than the 'last 30 days'.

# Note
The month/year selector does not need to allow for a day selection. However, it will likely need to create a JavaScript `Date` object in client-side code, so that we can pass a valid date string to the server-side query.

Start at the Home Profile Activities section and trace how its charts obtain activity data. Add month/year selection that defaults to the current month, creates a valid date for the server-side query, and refreshes the charts for the selected period; verify counts and activity data for a chosen group home and month.

Written by the indexing model from the issue text.