- add ChatClinetCustomizer support.
- add enable/disable property - enabled by default.
- add ITs.
Comment From: tzolov
squashed and merged at 0571aac44c2a99be439dac371c022c706bfe52dc
Comment From: tzolov
squashed and merged at 0571aac44c2a99be439dac371c022c706bfe52dc