Softkeyboard Done button cannot trigger submit button

[rak-sascha-github]

After tapping through any input fields with "next" on the soft keyboard, reaching the last field the "done" button appears which when tapped should trigger the submit button under an input form but has no effect on it. It seems focuser can be applied on a button but has no effect on it.

[vitaminBW]

Any changes? How can I add an action to the done button?