ACQ invoice formatting improvements

ACQ invoice formatting improvements

Prevent # invoiced and # paid inputs from wrapping.  Also, make the text
boxes a little smaller to reduce horizontal space requirements.  It's
still possible to enter any value, but only the 4 least significant
digits are visible.  Since it's not common to invoice 10k+ copies of the
same item, this seems like a fair trade off.

Signed-off-by: Bill Erickson <berick@esilibrary.com>
Signed-off-by: Lebbeous Fogle-Weekley <lebbeous@esilibrary.com>