iOS 4.2 Final beta

What I hope is the final beta for iOS 4.2 is out. This is a massive update that touches every part of the code and should be a huge improvement for everyone using Monal. Still no progress on adding to the french app store sadly. It will have to wait for at least 4.3 in 2020. I will be adding all of these changes to the macOS app next.

This is a large update with a lot of changes fixing or improving:

• OMEMO key exchange
• roster versioning
• push support (tested Tigase too)
• contact list accuracy
• chat synch and catchup (MAM)
• issues joining, rendering and leaving group chats (MUC)
• discovery of HTTP upload on some servers
• Ipad translucency issues
• numerous UI glitches, dark mode quirks
• many bugs that impacted stability