I often create emails to a group by dragging the names from an open email into the composer window but this no longer works. You simply can't drag email addresses anymore... Right now, all I can do is click each name, select-paste from the 'to' in the new composer which opens into my other composer window, then close the window.

Reproducible: Always

Steps to Reproduce:
1. view an email
2. try to drag the email address of the sender or somebody in (B)CC
3. Observe how nothing happens

Actual Results:  
You can't drag and drop

Expected Results:  
you can drag and drop