Node shuffling

[bvlj]

• Use the autoLayout feature of the ExpressionTreeWrapper component in the do page when all nodes are at position (0, 0)
• Provide an interface to allow an utility functions from outside the component to be invoked and shuffle the position of all nodes
• Add attribute to automatically shuffle the nodes in the initial state

Related to #89

[bvlj]

Maybe overlaps with thesis project of @Tiz-97