Haiku UI look patch
Inspired by this mockup, I started to implement something similar as code. Modifying the app_server and InterfaceKit code slightly, I came to the following intermediate result:
The patch is not quite finished, I just changed the drawing code of a few controls (window decorations, menus, scroll bars, buttons), and the look is not perfect yet, but I thought I should gather some feedback from you before I continue coding. The patch (against Haiku r28819) can be found here.