Description of problem:

If you press right mouse button on file with unknown mime type, menu
item "Send via Bluetooth..." is not available. The most bad thing is
that it's impossible to send Symbian application to install it on
Series60 mobile device.

Version-Release number of selected component (if applicable):

0.5.1-5

How reproducible:

always

Steps to Reproduce:
1. Create any file with extention .sis (symbian installation package)
or take real symbian appication file from somewhere
2. Open nautilus window with this file and press right mouse button on it.
  
Actual results:

Menu item "Send via Bluetooth..." is not available.

Expected results:

Menu item "Send via Bluetooth..." must be present for all files
including files with unknown mime type.

Additional info:

Reproduced also on files with .mo and .com extentions.