Columns can be edited like components. In order to do it, an edit button (⚙) appears above the column, when mouse moves over it. The properties that can edited are: background image, text color, background color, padding and border radius.
Added a duplicate button. It is placed in the sidebar when a component is selected.
New component: Video. It accepts youtube and vimeo links.
The maximun width can be edited for paragraph component. When value is less than 100% then paragraph will be displayed as an inline block, in this way it can be kept centered when the column has set the align center.
List component can accept the display list type property.