Wt

Hello, I'm trying to use the WFileDropWidget, but I can not get it to show on the page. I suspect the problem has to do with CSS. I have tried to get this to work by looking at https://webtoolkit.eu/widgets/forms/file-upload and at ...\wt-4.8.3\examples\filedrop\FileDropApplication.C

Should I see something after running
auto fileDW = root()->addNewWt::WFileDropWidget();?
What am I missing?

In general it would be nice if the widget gallery or examples folder would provide the user with the CSS needed to run the examples.