Fixed issue with navbar counts being misaligned

## What does this MR do?

Fixes an issue in FireFox with the number counts being mis-aligned.

## What are the relevant issue numbers?

Closes #18916 

## Screenshots (if relevant)

![Screen_Shot_2016-06-21_at_15.56.51](/uploads/1d07543c14215e9e15facacc96aa3564/Screen_Shot_2016-06-21_at_15.56.51.png)

See merge request !4829