[#1404] Call History

- Align Maximum.. with other strings above
- Replace [Maximum number of calls] with [History size limit]
- Replace the sliding bar with a number entry box [xxx ±]
- Add [calls] after the number entry box
- Make clear button size in sync with the SIP port apply button

PulseAudio sound server
- Replace [Control..volume] with [Mute other applications during a call]