Mobhack request

[jvankessel]

These are not bugs, but minor suggestions for change in interface behaviour:
- When selection in the units/weapons/formations listboxes changes, the listbox control loses its focus. The effect is that the user always has to use the mouse to select a different unit/weapon/formation, while it would be handy to scroll through the listboxes using the up/down/pgup/pgdn keys.
- When unit/weapon/formation data is saved, the corresponding listbox is updated (correct), but the selected listbox item position changes to the bottom of the listbox, making it a bit of a pita to work your way down to the next unit.

Again, these are just two minor things that bug me a bit. Otherwise, the utility is a very fine piece of software indeed.