CSS to add logo on the chat survey:
.surveysparrow-chat__header-left{
margin-left: 60px;
}
.surveysparrow-chat__header:before{
content: '';
position: absolute;
top: 50%;
left: 32px;
transform: translateY(-50%);
width: 32px;
height: 32px;
background: url('logo url here');
}
