Update companion web application (closes #35)

CHANGELOG.md

src/main/resources/webapp/css/bootstrap.min.css

src/main/resources/webapp/css/bootstrap.min.css.map

src/main/resources/webapp/css/fontawesome-all.min.css

src/main/resources/webapp/fonts/fa-brands-400.woff2

src/main/resources/webapp/fonts/fa-solid-900.woff2

src/main/resources/webapp/html/help/help.html

src/main/resources/webapp/html/help/sharing.html

src/main/resources/webapp/html/main.html

src/main/resources/webapp/js/bootstrap.min.js

src/main/resources/webapp/js/bootstrap.min.js.map

src/main/resources/webapp/js/jquery-3.3.1.min.js

src/main/resources/webapp/js/jquery.min.js

src/main/resources/webapp/js/popper.min.js

src/main/resources/webapp/js/popper.min.js.map

src/main/resources/webapp/templates/settings.ftl