User select serving size

[Trello card - User can assign serving size to recipe](https://trello.com/c/hIdZTdsb/25-user-can-select-serving-size)
Break tags should not be needed between block elements (div, h1, h2, p, etc). You are using a semantic element for styling. No need to change all now, but keep this in mind for the future. You should be using CSS (margin-botton, etc) to accomplish this spacing