[WP Pizza] Enable all ingredients in a specific meal size when on the WP Pizza Ingredients page, Ingredients tab

enableIngredients.js

// get a node list of all the ingredients on the page
var ingredients = document.querySelectorAll('.wppizza_ingr_option.wppizza_option');

// and then loop through each one, setting the meal size
ingredients.forEach(function(ingredient){
    ingredient.querySelector('input[type="checkbox"]').checked=true;
})