Please describe the problem:
The attachment bar in the compose window is hidden until one adds an attachment.
 It should be shown when composing begins with an attachment already selected,
such as by using nautilus-sendto.

Steps to reproduce:
1. Right click on a file in nautilus, "Send to..."
2. The resulting nautilus composer window shows no indication that a file is
attached to the message.
3. Add another file by clicking the attach button: the attachment bar is now
shown and the original file selected in nautilus is still there as well as the
second file.


Actual results:


Expected results:


Does this happen every time?


Other information: