This patch makes two trivial changes in the inventory interface:
 If you have uploaded a barcode file, the compare barcodes checkbox is
automatically checked. In most cases this will be the option the user wants.
The compare will report missed items on the shelf.
 If the compare barcodes checkbox is checked, the Skip items on loan-
checkbox is automatically checked. This again is often desirable. If you
compare, you normally are not interested in seeing items reported missing
while they are checked out.
 Upload a barcode file on inventory. Is the compare checked?
 Toggle compare. Does 'skip items on loan' change accordingly?