Evolution 2.0 UI proposal

Here at Ximian we have been brainstorming a bit about what happens
next in the Evolution world. One of the ideas that has come up is a
substantial overhaul of Evolution's UI.

Since images speak better than words, here are the mockups for some
designs that Anna has developed: (this is just to give a very rough
idea of what it would be like; the icons and labels are not final, the
widgets are not the real ones etc.)