Mutated prop in TreeviewVisualization

[pverscha]

The width prop is being mutated in the TreeviewVisualization, throwing errors:

[Vue warn]: Avoid mutating a prop directly since the value will be overwritten whenever the parent component re-renders. Instead, use a data or computed property based on the prop's value. Prop being mutated: "width"
      found in
      
      ---> <TreeviewVisualization>
             <Root>