Fix the font size and shortcut display of the turtledemo menu

[Xiaokang2022]

Bug description:

The font size of turtledemo's menu bar is too large and the shortcut keys are not displayed well enough.

Actually:

But better: (Changed the font and the way shortcuts are displayed)

I'll create a PR later to fix it.

CPython versions tested on:

3.13

Operating systems tested on:

Windows

Linked PRs

• gh-128062: Fix the font size and shortcut display of the turtledemo menu #128063
• [3.13] gh-128062: Fix the font size and shortcut display of the turtledemo menu (GH-128063) #128101

[terryjreedy]

On my MacBook Air, with a small screen, fontsize 12 is too small as the default, used for the top bar, appears to be 14. Command+- and Command+= are the keys that work in the text widget. Agree with leaving size alone and using the standard accelerator option.

[terryjreedy]

The 3.12 backport failed with a merge conflict. I consider it low priority.