The Tree View component is leveraging in line css styling. While not an anti-pattern, we do prefer custom classes when it's clear lots of styling will be needed. 

This is a reminder to migrate that styling to the TreeView stylesheet and test against all related styling bugs from past tickets:

1. Width of the dropdown matching width of the menu.
2. Dropdown height not too large. Drop down is not falling off screen.
3. Dropdown fits the size of its internal contents.