[locale] Update for these changes.
[qrvthtool] Update for localized RVT-H error strings:
- WorkerObject: Don't include the error code in the message when
emitting finished().
- QRvtHWindow: Handle RVT-H error codes better:
- If -ECANCELED is returned, show the message as-is, since the operation
was cancelled.
- If it's an RVT-H error, use QCoreApplication::translate() with the
"RvtH|Error" context and rvth_error(err) string.
- If it's a POSIX error, use rvth_error() anyway for now.
FIXME: Need to properly translate POSIX errors.
Use a '%1' placeholder for "doExtract" and "doImport", since the messages
are all the same except for the function name.
[locale] Update localizations for this change.
