#829: Seems to fix the bad filename suffix fatal error and the notices; because of a new admin function processImageEdit() we stay on the single image edit page after saving (for yet unknown reasons not if using move/copy/rename though).
Merge remote-tracking branch 'upstream/master' into zenphoto--forward

Conflicts:
	zp-core/admin-edit.php
Merge branch 'zenphoto--forward'