more structure & some mobile fixes

resources/frontend_client/app/card/card.charting.js

resources/frontend_client/app/card/card.controllers.js

...rces/frontend_client/app/components/dropdown/dropdown.css

resources/frontend_client/app/css/core/base.css

resources/frontend_client/app/css/home.css

resources/frontend_client/app/css/query_builder.css

resources/frontend_client/app/home/home.html

resources/frontend_client/app/query_builder/header.react.js

resources/frontend_client/app/query_builder/icon.react.js

.../frontend_client/app/query_builder/visualization.react.js

resources/frontend_client/index.html