ui: Track changes to UI font size made via actions with settings (#23265)

Fixes #5380

Closes #5380

Release Notes:

- Font size changes made with actions are now persisted in user settings

crates/ui/src/styles/typography.rs

@@ -82,7 +82,7 @@ pub trait StyledTypography: Styled + Sized {
     /// or other places that text needs to match the user's buffer font size.
     fn text_buffer(self, cx: &WindowContext) -> Self {
         let settings = ThemeSettings::get_global(cx);
-        self.text_size(settings.buffer_font_size(cx))
+        self.text_size(settings.buffer_font_size())
     }
 }