How can I hide the expand button on the right side of the panelbar header if there is nothing to expand? I am willing to do this either through code somehow or even if I have to access the css and set the fill of the svg icon to white I will, but I have not been able to do so, thus far. At very least disabling the expand button would be an option as well. As you can see in my image, the top item I want an expand button but the one beneath it since it has zero hours should be removed. Any help would be appreciated.