Persistent vertical scrollbar even when all content is displayed on the page

### Environment
* Python version: 3.6.9
* NetBox version: 2.10.2

### Steps to Reproduce
1. View the NetBox home page
2. Extend the browser window enough to fit all displayed content

### Expected Behavior
The scrollbar should be hidden.

### Observed Behavior
The scrollbar persists and the page can be scrolled a few pixels vertically.