FeatReq: use the Textual reccomended spec for the terminal fonts and line spacing and character spacing

[Emasoft]

According to the Textual FAQ the issues with the terminal characters can be solved by using the reccomended settings:

• FONT = Menlo
• STYLE = Regular
• Character Spacing = 1.0
• Line Spacing = 0.805

SOURCE: https://github.com/Textualize/textual/blob/main/docs/FAQ.md#why-doesnt-textual-look-good-on-macos

Unfortunately the config utility of a-Shell can only set the Font family, not Character Spacing or Line Spacing. Is it possible to add those two settings?

HOW TO REPRODUCE THE BUG
Here is a zip file with two small python scripts you can use to test the characters issues on a-Shell:

test_code_textual_characters_issues.zip

Of course you also need to install the Textual package:

https://pypi.org/project/textual/