Call connect on keypress toggle for call action

We had observed for some carriers the DTMF tone after keypress was not recognised by twillio. As a fix and an enhancement, we have provided a toggle "CONNECT CALL AFTER KEYPRESS".

When enabled (default), we will wait for the agent to press any key to connect the call with the contact. When disabled, we will play the whisper message three times and automatically connect the call. Also we have moved this and DISABLE VOICEMAIL DETECT toggle under advanced settings.