In addition to adding buttons for new features, re-doing the UI to use FrameXML instead of AceGUI will allow for better layout to start with. One additional tweak that should probably happen is moving the "Clear All" button to the bottom of the main window, so it doesn't get clicked accidentally.

FrameXML layout will probably use SetPoint() a lot, as opposed to how it works in AceGUI.

Requires #2 to be done as well (or at the same time).

This is now implemented (ea96194).