Tree layout - orientation option

[stuartgreen4j]

Is your feature request related to a problem? Please describe. The new tree layout option renders the graph in a hierarchy from bottom to top. With >50 nodes this leads to overlap of any text displayed with the nodes.

Describe the solution you'd like Enable selection of orientation of layout e.g. top->bottom, bottom->top, left->right & right->left

Describe alternatives you've considered No alternative possible.

Additional context None