Revised display of the accelerator and detector sections.

Accelerator now displays the information associated with its current
level (except data rate, since I couln't think of a good way to covert
the in-game value to something displayable).
Detectors now display quality in %, and also display scientist slots.
Display detector buttons below each other to allow proper display of
their names.
Set width of "Show available detectors" button to auto, since 2 * button
width no longer makes sense.