It never allocated any non-autoreleased objects so ARC wasn't actually
doing anything other than breaking compilation with gcc.

Fortunately "Action" is also used in the select lines dialog so it's
already present in the translations.

wxLANGUAGE_ENGLISH corresponds to the "en" locale on Linux, which is
generally not installed, which resulted in English actually being the
system default locale.

Updates #1508.

Errors when not getting with volume need to be handled too.

Updates #1509.

When run from an app bundle the locale environment variables are unset,
and the default locale settings are bogus as a result.