Fixes for Studio crashes, Sign in with Apple, project invite links and upgrade screens.

Fixed

• Fixed Studio crashes when recording, changing effects, and editing or duplicating segments.
• Sign in with Apple on the login screen no longer shows "Sign In Failed" before signing you in.
• Project invites open over other screens, invite links always open the invite, and "Not Now" no longer leaves the app unresponsive.
• Upgrade screens opened from links stay open until you close them.
• Fixed crashes in Activity, playlists, lyrics and artwork.