Made OptionMenu bindable, using a similar API to TextScrollList.

[theodox]

What would you say to this instead?:

   @property
    def items(self):
        return [i.tag for i in self.controls]

    @items.setter
    def items(self, value):
        selected = self.select
        self.clear()
        self.controls[:] = [MenuItem(val, parent=self, tag=val) for val in value]
        if selected:
            self.select = selected

That way the collection remains the same. TextScrollList is a bit wierd because we know the collection has to be text. Going with the originals would means you get back MenuItem instances when you iterate over the colllection. What's the expected behavior there?

[bob-white]

That works for me.

So far my use case has been isolated to doing a one way binding of collection > menu. So I hadn't even noticed that a 2-way would mutate the collection's types and contents.

Updated the PR with your changes.