feat(widgets-popupMenu): set inline-block as default display css
chore(demoSite): add custom css
feat(widgets-popupMenu): update the demo
feat(widgets-popupMenu): modify positioning when "direction" is set to "left"
feat(widgets-popupMenu): update the demo
feat(widgets-popupMenu): remove "menuOptions" from the list of widget options
feat(widgets-popupMenu): add handling of "dataSource" option
feat(widgets-popupMenu): update the demo