[REG] iOS: Keyboard Cannot Be Closed Manually

Related to 5.4-Beta

Standard Apple keyboard on an iPad has a button for
manual closing in the right bottom angle.

1. Compile textedit example versus 5.4-beta;
2. Run the example;
3. It appears with keyboard;
4. Tap on the KB-closing-button and
observe that keyboard is not closing;
5. Write something in the editing control;
6. Tap on the KB-closing-button and
observe that keyboard is not closing;

7. Compile the example versus 5.3.2;
8. Proceed with steps 1-6 and observe
that in steps 4 and 6 the keyboard is do closing;

I suspect that there's an issue
with QInputMethod->keyboardRectangle as well,
but to investigate it, patch for this issue is required.

Please, provide the link to the patch when fixed.
Thanks.