Added miss translation part in 6 files., use __()

1. data import page
2. desktop, dialog show all applications
3. message module
4. search box
5. list view
6. core module, description
It is strange, as other modules works well(I mean don't include __()), however core module translation doesn't work for description, I was going to do a test in demo site, however, no permission, you can take a look if it is.