When trying to enter text into kivy TextInput via SwiftKey, the following happens:

1. backspace key doesn't work at all
2. when typing, only one character is inserted, all subsequent chars replace the first
3. when choosing the word from the prediction list, it is inserted

I suppose this issue is somehow related to #178 fix.

Environment tested: Galaxy S3, Android 4.2.2 (CyanogenMod), SwiftKey 4.3.2.235