function viewfieldPath() {
            let d = this.parentNode.__data__;
            if (d.isPano && d.id !== selectedImageId) {
                return 'M 8,13 m -10,0 a 10,10 0 1,0 20,0 a 10,10 0 1,0 -20,0';
            } else {
                return 'M 6,9 C 8,8.4 8,8.4 10,9 L 16,-2 C 12,-5 4,-5 0,-2 z';
            }
        }
Update the currently highlighted sequence and selected bubble
@param {*} context Current HTML context
@param {*} [hovered] The hovered bubble image