Release Notes:
- N/A
---
- Set `.SystemUIFont` as the GPUI default font.
- Add `Arial` to font fallback list.
- Add `Adwaita Sans` to default fallback list for Gnome.
- Move `Ubuntu` font to front of Gnome to make sure Ubuntu System takes
priority over `Ubuntu` font.
Our application get some crash report:
```
panicked at /Users/admin/.cargo/git/checkouts/zed-a70e2ad075855582/f1db3b4/crates/gpui/src/text_system.rs:150:9:
failed to resolve font 'Helvetica' or any of the fallbacks: Zed Plex Mono, Helvetica, Segoe UI, Cantarell, Ubuntu, Noto Sans, DejaVu Sans
```
This change to add `Arial` to fallback list, this font was included in
macOS and Windows.
Ref link (search "Arial"):
> Mac OS X (now known as [macOS](https://en.wikipedia.org/wiki/MacOS))
was the first Mac OS version to include Arial;
> https://en.wikipedia.org/wiki/Arial
- macOS Sequoia: https://support.apple.com/en-us/120414
- Windows 10:
https://learn.microsoft.com/en-us/typography/fonts/windows_10_font_list
- Gnome: https://developer.gnome.org/hig/guidelines/typography.html
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