Release version 1.40.
Fix a bug whereby quick saved states would have a screenshot of "Saving state...".
Complete the Dutch, German, Portuguese (Brazil) and Spanish localisations, aligning some messages to columns for option screens.

* Dutch: Add missing messages. Fix a typo in global button mappings. Thanks to Aeter for this part.
* German: Add missing messages. Thanks to SignZ for this part.
* Portuguese: Add missing messages. Thanks to Diego Liberal for this part.
* Spanish: Add missing messages. Thanks to Boriar for this part.