State property 'operator' is undefined

[nschainblatt]

The property operator in the state object is not implemented and is used in both group filter and advanced group filter functionality.

    /**
     * Writes the currently selected group's to the top bar, and injects 'OR' if there are multiple
     * filters selected.
     */
    writeActiveGroups(){
        let text = `Active Groups:`;
        let stateLength = this.state._activeGroups.length;
        
        if(stateLength > 0){
            text += _GroupHelper.generateActiveHeaderText(this.state, stateLength, this.groupsDictionary, **this.state.operator**);
            this.deleteAllBtn.style.display = 'inline';
        } else {
            text += ` All`;
            this.deleteAllBtn.style.display = 'none';
        }

        this.activeLabel.innerHTML = text;
    }