Edit Test Step - Loses pasted image reference if attachment is added.

Description

When you are editing a test step and you paste a picture in the expected result and also add a file to the attachments and then save the step, the pasted image reference is empty because by adding an attachment mannually the one from the pasted image is lost.

Pre-conditions

Have a manual test with steps.

How to reproduce

1. Open the manual test and start editing a step
2. Paste a screen capture into the expected result field
3. 
4. Then add an attachment to the step
5. 
6. Now you can verify that only the added attachment is there:
7. 
8. Press done to save the step and verify that the image reference is lost:
9. 

Actual result/Attachments

Expected result

Both attachments should be kept along the step edition/creation.

Version

• 4.2.14

Environment

• Verified in multiple environments