* fix attachment permissions: 	- when opening directly, set permissions to 0444 (read-only) 	- when saving, set permissions to 0644 (read/write)
* fix attachment permissions:
	- when opening directly, set permissions to 0444 (read-only)
	- when saving, set permissions to 0644 (read/write)

pmo-trunk-r3744

community-ssu/modest,community-ssu/modest,community-ssu/modest,community-ssu/modest