UI: Adjust font size on mac

[Warchamp7]

Description

Changes the font size on macOS to be more appropriate

Depends on #10661, supersedes #10660 Closes #10660

Motivation and Context

10pt font is smaller on macOS than other operating systems. We increase it only on macOS

How Has This Been Tested?

It has not

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• Tweak (non-breaking change to improve existing functionality)

Checklist:

• [x] My code has been run through clang-format.
• [x] I have read the contributing document.
• [x] My code is not on the master branch.
• [ ] The code has been tested.
• [x] All commit messages are properly formatted and commits squashed where appropriate.
• [x] I have included updates to all appropriate documentation.