There is no option to delete an uploaded photo #85

Steps to reproduce

1. Tap on already submitted signal.
2. Tap on "Upload photo" button.
3. Upload a random photo.
4. Delete the uploaded photo.

Expected result

1. Signal Details" window is opened.
2. A phone gallery and camera are opened.
3. A photo is uploaded.
4. The photo is deleted.

Actual result

1. Signal Details" window is opened.
2. A phone gallery and camera are opened.
3. A photo is uploaded.
4. There is no option to delete an uploaded photo.