Setting width of controlsFX dialogs

Question

I'm using controlsFX for dialogs and I can't figure out how to set the width. A lot of my messages only include the title, masthead and buttons. But the text in the buttons isn't fully display. For example:

    Action deleteStuff = new DialogAction("Delete Stuff", ButtonBar.ButtonType.OTHER);
    Action deleteMoreStuff = new DialogAction("Delete More Stuff", ButtonBar.ButtonType.OTHER);

    Action response = Dialogs.create()
            .owner(stage)
            .title("Delete")
            .masthead("This is a delete dialog")
            .actions(deleteStuff,deleteMoreStuff,Dialog.ACTION_CANCEL)
            .showConfirm();

And one of the buttons will show: "Delete Mo..."

And yes, I know I should be using the Alert class, but the project is for machines running older versions of Java. Thanks in advance.