Update licenses and about box for 2.10 and master branch changes

[mjkkirschner]

Purpose

PR does the following:

• adds references that were missed for pythonmigration extension
• adds references used in markdown2html.exe project
• removes old reference to msvc redistributable for 2013
• updates license pointer for xceed wpf to version that we reference were the license was still MS-PL - NOTE! we will not be able to update this dependency without investigating the new license. beware. ⚠️
• updates the link styling in the rtf doc so all the links now appear blue, highlight subtly, and open a browser.

Declarations

Check these if you believe they are true

• The codebase is in a better state after this PR
• Is documented according to the standards
• The level of testing this PR includes is appropriate
• User facing strings, if any, are extracted into *.resx files
• All tests pass using the self-service CI.
• Snapshot of UI changes, if any.
• Changes to the API follow Semantic Versioning and are documented in the API Changes document.
• This PR modifies some build requirements and the readme is updated

[QilongTang]

Does the alignment matter here? Looks off

[QilongTang]

Same here