accerciser: Interface Viewer plugin display of states should be wider

Modified interface_view.ui:
1. Made the states display box expandable horizontally to avoid
horizontal scrolling.

2. Moved the attributes display from below to beside the states
display.

3. Moved the relationships disply from beside to below the states
display.

https://bugzilla.gnome.org/show_bug.cgi?id=704550