Graylog logo can disappear depending on the resolution and amount of navigation items.

## Expected Behavior

## Description

Depending on the resolution and amount of navigation items, it is possible that the graylog logo is not being displayed. In the following case I am using a window width of ~1015px.

How it should look like:

## Steps to Reproduce (for bugs)

1. Make sure to display similar navigation items
2. Set the window width to 1015px.

## Environment
* Graylog Version: dev version for 5.2