Display file ownership and permissions.

This subsumes #414. Took feedback into account to display more
human-readble permissions. Also, display the owner and group ownership
inline with the permissions themselves.

i18n/en/cosmic_files.ftl

@@ -58,6 +58,15 @@ apply-to-all = Apply to all
 keep-both = Keep both
 skip = Skip
 
+
+## Metadata Dialog
+owner = Owner
+group = Group
+other = Other
+read = Read
+write = Write
+execute = Execute
+
 # Context Pages
 
 ## About