Comment 14 for bug 1347305

While I completely understand the intention of this change and agree mostly, I have some concerns with this implementation:

- No distinction between sender, recipients and subject.
- Depending of the theme the horizontal lines look ugly / too thick.
- Widget of the drop-down menu doesn't respect the system widget toolkit theme.
- Input fields appear to be disabled (grayed out).
- Hovering with the mouse looks disturbing, contrast between gray/white too high.

I think it would look great with some improvements. Either try to make it compatible with all system themes or use only custom widgets (and respect only background/foreground color).