Delete dashboard modal, misc cleanup

...ontend_client/app/components/DeleteQuestionModal.react.js

resources/frontend_client/app/css/home.css

resources/frontend_client/app/dashboard/actions.js

...ashboard/components/AddToDashSelectQuestionModal.react.js

...ontend_client/app/dashboard/components/Dashboard.react.js

..._client/app/dashboard/components/DashboardHeader.react.js

...nt/app/dashboard/components/DeleteDashboardModal.react.js

...end_client/app/dashboard/containers/DashboardApp.react.js

...es/frontend_client/app/dashboard/dashboard.controllers.js