Scroll bar doesn't update when opening and closing dropdowns in search for people screen

Scroll bar doesn't update when opening and closing dropdowns in search for people screen.

How to reproduce:

1. Go to the social drawer

2. Click search for people

3. Open the three dropdowns

4. Observe the scroll bar not updating after opening and closing the dropdowns

5. Click the load more results button if available

6. Observe the scroll bar not updating after clicking the load more results button

Observed results:

The scroll bar fails to update after opening / closing dropdowns and clicking the load more results button.

Expected results:

The scroll bar should update when opening / closing dropdowns and clicking the load more results button.