Update notification screenshots in the documentation for Jessie

The notification mechanism changes in Jessie and the screenshot need to be updated to the new display.

• /doc/get/verify_the_iso_image_using_gnome

Parent Task: #7584 (closed)

Related issues

• Has duplicate #10882 (closed)
• Blocked by #7989 (closed)

Original created by @sajolida on 8040 (Redmine)