Update Nautilus screenshots for Jessie

The interface of Nautilus changed in Jessie and screenshot should be updated.

• /doc/encryption_and_privacy/secure_deletion
• /doc/first_steps/introduction_to_gnome_and_the_tails_desktop

Feature Branch: emmapeel:feature/8062-update_screenshots_jessie

Attachments

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Related issues

• Related to #10787 (closed)

Original created by @sajolida on 8062 (Redmine)