Keep encryption enabled if decrypting for single user
Keep encryption enabled if decrypting for single user

When decrypting all files of a single user, the admin usually does not
intend encryption to be suddenly disabled for everyone. This fix
reenables encryption after decrypting for a single user.

Decrypting for all users will still disable encryption globally.

bluelml/core,bluelml/core,owncloud/core,bluelml/core,cernbox/core,owncloud/core,phil-davis/core,cernbox/core,bluelml/core,sharidas/core,owncloud/core,IljaN/core,sharidas/core,cernbox/core,pollopolea/core,owncloud/core,bluelml/core,owncloud/core,sharidas/core,pollopolea/core,IljaN/core,pollopolea/core,IljaN/core,pollopolea/core,sharidas/core,sharidas/core,IljaN/core,cernbox/core,pollopolea/core,cernbox/core,IljaN/core