I'm brand new to working with dojo and the WAB. I'm creating a custom widget and I'm trying to control the default size of the container "window" that opens to house the widget. It seems that if I add the widget to the header widget container/controller, the default size is 360 pixels wide and 100% tall. I've removed it from there and added it to the "1" widget button in the WAB and now I can at least adjust the size of the widget's container window once it's open, but more importantly... How/where do I set the size of the widget's container when it opens?