Modal "esc" key closes fullscreen browser

Created by: callumstrubi

Pressing the "esc" key to close a modal will close the browser in macOS from fullscreen using the default browser action

Tested on: macOS Sierra, Safari Version 10.1

Simple JSBin: https://jsbin.com/buciferovu/edit?html,css,output

Proposed fix: preventDefault(); added to modal close action when triggered from keypress