Fix display in installer

[Rushaway]

Description

Small correction for installer:

• Add more space before the HelpIcon
• Missing images
• Css small correction

Motivation and Context

Make it easier to read

How Has This Been Tested?

Tested and worked 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.