'SCAN' button does not show up when the device is rotated.

OpenKeyChain

Project Information
• Repository : https://github.com/open-keychain/open-keychain
• Project Name : OpenKeyChain

Expected Behavior
I should be able to scan Secure Wifi Transfer QRcode in landscape mode.

Actual Behavior
But the Scan button doesn't show up when rotating the device.

How to reproduce

1. First download the app from F-Droid.
2. Launch the app.
3. Tap on the SECURE WIFI TRANSFER.
4. After that, rotate the device as it is.
   You can see, the SCAN button does not show up.

• App Version : 5.0.2
• Operating System : Android 6.0
• Device : Lava Iris 50

Recording of the bug

Proof of work done
https://github.com/iamsudipbh

Issue in github
https://github.com/open-keychain/open-keychain/issues/2328