Portuguese, lyrics from LRCLIB & promo codes in the purchase screen

• Mobile MA now speaks Portuguese – in two separate versions for Brazil and Portugal; that makes nine languages
• Lyrics come from LRCLIB first, other sources only after that
• Promo codes are redeemed right in the purchase screen – on iPhone and Apple TV, no detour
• Support and the FAQ open in the language you use the app in
• The player list marks your own device with “This iPhone”
• Fixes & stability