Columns widgets

As a Studio app builder, I can drag and drop widgets to structure my layout

AC
Following widgets are available in the "Containers" category

• 1 column
• 2 columns
• 3 columns
• Card

• I can d&d columns inside columns to create more complex layouts

• Columns generated by a widget can be moved around using d&d
  • to change their order
  • outside of its container
  • inside another column

• Elements can be d&d inside columns and moved outside of them

• When I move a column, the preview is udpated dynamically
• When I move a column, its whole content is moved as well
• I can move any column left or right from an existing one
• I can move elements inside or outside an existing column
• I can move a column outside of a container

• Analytics event is sent when d&d a widget
  • Category: Described according to NXS-5742
  • Event: Widget drag and drop
  • Label: [Widget name]