PicToPC 0.7.14 — Amazon empty-uploader detection fix

Amazon's Product image guidelines panel contains a sample toaster photo even
while closed. Version 0.7.13 incorrectly counted that help image as an existing
offer photo and refused to insert photos into an empty offer.

Excludes only the identified product-image-guidelines-modal from media checks.
Actual offer images and upload progress indicators still block insertion, even
when hidden, to prevent overwriting or duplicate uploads. The six-photo limit
and Used-condition requirement remain unchanged.

Reload this updated extension and refresh Amazon and PicToPC. Select Send to
marketplace again before inserting. No real offer was changed during testing.
