Issue Summary

When you use a screenshot tool that lets you store it in the clipboard and then pasting it with command + v into a pop-up issue view it is added automatically but also an attachment screen appears asking for upload if you click on upload the picture is attached twice.

Steps to Reproduce

1. Create a screenshot storing it in the clipboard
2. Open an issue in the pop-up view e.g. clicking it in a board
3. In the pop-up view use command + v to paste it
4. See an example below, I used monosnap as the screenshot tool
   https://share.getcloudapp.com/6quPyROl

Expected Results

The attachment should be added. until the upload button is clicked

Actual Results

The attachment is added in the background and also when you click on the upload button

Workaround

Click the CANCEL button instead of the UPLOAD button