The image preview doesn't work correctly when editing the Manual Test Step fields. It only works under certain conditions when resizing it in visual mode

The image preview doesn't work correctly when editing the Manual Test Step fields. It only works under certain conditions when resizing it in visual mode.

There are two different paths that show the problem occurring:

Adding new Image:

1. Open test Ticket
2. add a Image e.g. via Drag and Drop
3. add new Step
4. insert Image in visuell Mode about Image Insert Button from Menu Bar
5. click on Text Mode
   1. the Bild Desc contain no Size values of Thumbnail
   2. !Screenshot_4.png|thumbnail!
   3. go back to visuell Mode
6. save
7. now click on Image
8. the Image is not opened, but you are in Edit Mode again
9. delete Image
10. add Image again about Button
11. change size of thumbnail by dragging the edge of the image
12. click on text mode
    1. the image desc contain size values now
    2. !Screenshot_4.png|width=204,height=204,thumbnail!
    3. go back to visuell mode
13. save
14. click on Image
15. the Image Preview is opened now

Change Text after adding correct working Image thumbnail

1. delete Image
2. add Image again about Button
3. change size of thumbnail by dragging the edge of the image
4. click on text mode
   1. the image desc contain size values now
   2. go back to visuell mode
5. add text under the Image!
6. save
7. click on Image
8. the Image Preview is opened now
9. close Preview
10. click on Text under Image
11. the edit mode is opened again
12. change only the text or add more text
13. save
14. click on Image
    1. the Image Preview is not opened again
    2. you are opened the edit mode again
15. click on Text Mode
    1. the word “thumbnail” is deleted in Image Desc
    2. !Screenshot_4.png|width=204,height=204!