View stays in landscape when keyboard is open

[ChristianeMussmacher]

version 3.3.26 only reproducible on iPhone 5 running iOS9 (9.0.1)

Steps to reproduce:

• open chat
• click in insert field to open keyboard
• change orientation
• view stays in landscape mode

[pavel-mayer]

Can not reproduce on iphone5 simulator with iOS 9.1.