adding local references to fonts

[akingscote]

Type of change?

• [x] Bug fix
• [ ] New feature
• [ ] Enhancement
• [ ] Breaking change (breaks backward compatibility)

Description, Context, Motivation

The fonts were specified on a website that is no longer available. I have implemented the fixes in: https://github.com/Azure/azure-iot-pcs-remote-monitoring-dotnet/issues/165

Its took me a long time to realise that it was a font issue and not an SVG issue. This change needs to be in the main version otherwise everyone that uses this app is going to have mission icons ...

Checklist:

• [x ] All tests passed
• [x ] The code follows the code style and conventions of this project
• [x ] The change requires a change to the documentation
• [x ] I have updated the documentation accordingly

[msftclas]

All CLA requirements met.

[akingscote]

@ppathan Can you take a look at this? Looks like the projects pipelines are broken