Using the BIM edition of OP and while uploading an IFC Begin of the insertionfile (which can take longer),End of the insertion Begin of the deletion file,End of the deletion the upload would abort if the page was accidentally Begin of the insertionleft.

Having a warning when you leave beforeEnd of the insertion Begin of the deletion left withoutEnd of the deletion the Begin of the insertionupload has finished would help prevent that from happening.

Acceptance criteria:

* Upload an IFC file
* Before finishing the upload leave the page
* A confirmation dialogue asks "You have uploads pending. AreEnd of the insertion Begin of the deletion standard web-browser notification (AreEnd of the deletion you sure you want to Begin of the insertionleave?"
* On confirmation it will leaveEnd of the insertion Begin of the deletion leave?)

Attached a GIF explainingEnd of the deletion the Begin of the insertionpage
* On cancellation it will stay on the current page so that the upload can finish.

The following screen capture show the issue:

<figure class="image op-uc-figure"><div class="op-uc-figure--content"><img class="op-uc-image" src="/attachments/32856/content"></div></figure>End of the insertion Begin of the deletion errorEnd of the deletion