Change en-us localization "mirror from" to "mirror of"

conf/locale/locale_en-US.ini

@@ -376,7 +376,7 @@ migrate.permission_denied = You are not allowed to import local repositories.
 migrate.invalid_local_path = Invalid local path, it does not exist or not a directory.
 migrate.failed = Migration failed: %v
 
-mirror_from = mirror from
+mirror_from = mirror of
 forked_from = forked from
 fork_from_self = You cannot fork a repository you already own!
 copy_link = Copy