This time enhancements stuff

1. Speech to text support. Only google chrome at the moment has this hTML5 API. Tutorial here
2. Theme variable was not forwarded internally. (During read operator message action)
3. Relative position for iframe. Some sites are using nonsense iframe positions.
4. Operator typing issue was fixed. Operator typing message was shown and was not shown again even if operator was still typing
5. Text preview position was changed.
6. Various co-browsing improvements.

For update just follow standard update procedure For manual update it's update_98.sql