Missing warning dialog when action is taken to remove article offline availability when that article is on multiple lists

Steps to reproduce

1. Add the same article to two reading lists (by default, the article will be made available offline).
2. Go to one reading list and remove that article from being available offline

Expected

Warning dialog message is shown advising that the article appears on multiple reading lists, with bullet point list of all lists containing that article:
Dialog will ask for a confirmation to "Remove from offline" or allow user to "Cancel".

Dialog text:

Actual

Article is removed from offline on all lists with no warning dialog