Change the default fonts and sizes

[jwrober]

Is your feature request related to a problem? Please describe.
Related to issue #1292. Even if we don't bundle our own fonts, we should consider the defaults being used for all of the categories.

Describe the solution you'd like
This screen shot shows the default values on a Linux computer after PR #1281 is merged into master branch.

I suggest these defaults:

• Default -- Sans Serif size 12, normal
• Notify Label -- Sans Serif size 12, bold
• Help Label -- Monospace size 12, italic
• Help Text -- Monospace size 12, normal
• Chatling -- Monospace size 12, normal
• City Names -- Sans Serif, size 14 normal
• City Productions -- Sans Serif, size 14 bold
• Requirements Tree -- Sans Serif, size 12 italic

I went with monospace in the help because I personally think it is easier to read with the way we do formatting with the static text and then the generated text from the ruleset.

Describe alternatives you've considered
None

Additional context
This came up as part of the bug fix review in PR #1281

[jwrober]

Duplicate of #1273 - Closing