Implement back and forth functions

[crescendochu]

• [x] Add for image selection
• [x] Add for image comparison
• [x] Add for text questions
• [ ] Make sure the answers are still there when they go back
• [ ] Add verification for image selection
• [ ] Add verification for image comparison

[crescendochu]

Image selection added via 86c1afd2068814d4942268ffdb4999df978bec30

[crescendochu]

Image comparison added via ac36492da512fad2f97f4025953138dc263c58cc