Ensure that action label ordering from Gambit Games is left to right

[edwardchalstrey1]

Requested enahancement or feature

g1 = gbt.Game.new_tree(
    players=["1", "2"],
    title="Simultaenous move game."
)
g1.append_move(g1.root, "1", actions=["s" + str(i) for i in range(N)])
g1.append_move(g1.root.children, "2", actions=['r', 'l'])

draw_tree(g1) # why do l and r appear in reverse order?

We want action labels to appear from left to right not right to left (for player 2 they are ['r', 'l'] not ['l', 'r'])

[edwardchalstrey1]

I think this is because in the Gambit layout it’s top to bottom and we’ve effectively rotated the layout 90 degrees counter-clockwise.