Menus: Consider using a stronger font-weight for UI

[octref]

Refs: #52854

@bpasero @Tyriar @misolori Wondering what's your opinion? During today's testing I was staring at the menu for a few hours and I found the font too thin and lightweight.

I find increasing the font-weight to 500 makes it much easier to read.

For the sake of consistency, this will impact both Menu bar and the Panel Bar.

White

font-weight: 400

font-weight: 500

Dark

font-weight: 400

font-weight: 500

[octref]

This is the effect of both fix #53007 (make label / shortcut both 12px, currently label is 11px and shortcut 12px) and applying the 500 font-weight:

[Tyriar]

I think we should try align with what Windows does by default

[bpasero]

Yeah I find the menu in light theme especially hard to read. Agree, we should try to use a similar font size and weight as the default menus.

[miguelsolorio]

I also agree that matching what Windows does by default. Is there a reason why we decided to not use the default font size/weight?

[Cirieno]

Agreed. Having the items in a menu at a font smaller than the menu itself makes the menu items harder to read (thinking of anti-aliased / Cleartyped but not hi-def screens)

Same issue: ref #52484

[sbatten]

font sizing was changed via #54695, I think this solves the issue at heart here and font weight can remain the same. please re-open and provide feedback if you feel the weight is still an issue.