[2.1] Ext.Msg.prompt buttons hiding behind keyboard on Android 4
On iOS and Android 2,
when setting the focus into the Ext.Msg.prompt input field, the message box moves up to the center between keyboard and top to make it fully visible, including the message box buttons.
On Android 4, this isn't the case and the buttons are either hidden partially in the default prompt box where the input field is one line tall,
or in our case completely since we use a multiline (3 lines) input field.