Install: missing css

[Rushaway]

Description

Add some css to make a better display

Motivation and Context

Un-readable text

How Has This Been Tested?

Apply change on my dev board and work like a charm

Screenshots (if appropriate):

Before :

After :

Types of changes

• [X] Bug fix (non-breaking change which fixes an issue)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [X] My code follows the code style of this project.
• [ ] My change requires a change to the documentation.
• [X] I have updated the documentation accordingly.
• [X] I have read the CONTRIBUTING document.

[Rushaway]

@Hackmastr Any review ?

[Hackmastr]

Thanks!