Feature summary (what you would like to be able to do and where):
Warn before abandoning edits

Use case(s) (list the steps that you performed to discover that problem, and describe the actual underlying problem which you want to solve. Do not describe only a solution):
Currently when using the Wikipedia App, if you begin making an edit and navigate away from the edit without publishing you are prompted to confirm that you want to abandon the edit.

However, if you follow a link in another app (such as your browser, a messaging system, etc) that opens in the Wikipedia App while you have an editing session open the app silently abandons the editing session and opens the link for reading.

Benefits (why should this be implemented?):
Prevent loss of effort for editors that use the Wikipedia App