Navigation menu background is shorter than length of the menu

[jdmedlock]

Error:
The background color of the navigation menu (righthand hamburger menu) is shorter than the length of the menu component.

Symptoms:
When displayed the navigation menu background color is missing from the lower one-third of the menu causing the lowest menu items to blend into the page content area.

Steps to Recreate:
Display the navigation menu by clicking on the righthand hamburger and then scroll down to view the menu items.

Resolution:
.side_panel in style.styl contained a fixed height. Removed height specification.