Relayer command enhancements

Today we released an updated Relayer command with two new features

The first change is the addition of the Clear layer list button that eliminates all of the layers from the target layers list in a single click

The second change is the "Add all layers in the associated layer group checkbox. When checked, when a layer is selected for addition to the target layer list, the command identifies the layer group of the selected layer and then also selects all of the layers in the selected layers layer group and adds all of the layers to the target layer list in a single click

Two small changes but both improve speed and usability