Improved performance when loading chat overview
Improved performance when sending media files
Key fingerprint replaced with public key in UI
Fixed a possible bug in relation to external keyboards
Other improvements and miscellaneous minor bug fixes
Security fix: A malicious directory server could theoretically trick a client into encrypting an arbitrary message to another user. The protocol and apps were updated to prevent this. The issue was never exploitable without having privileged access to Threema infrastructure (reported by Jonathan Krebs, Universität Erlangen-Nürnberg).
