Fix crashing on droping text (#302)

* Add basic drop overlay

* Prevent crash when dragging text

* Only show popup when files are being dragged

* Make drop box bigger

* Make drag drop overlay without a modal

* Don't show drag drop menu on top of modals

* Use different way to check for modal

src/app/organisms/drag-drop/DragDrop.jsx

@@ -0,0 +1,24 @@
+import React from 'react';
+import PropTypes from 'prop-types';
+import './DragDrop.scss';
+
+import RawModal from '../../atoms/modal/RawModal';
+import Text from '../../atoms/text/Text';
+
+function DragDrop({ isOpen }) {
+  return (
+    <RawModal
+      className="drag-drop__model"
+      overlayClassName="drag-drop__overlay"
+      isOpen={isOpen}
+    >
+      <Text variant="h2" weight="medium">Drop file to upload</Text>
+    </RawModal>
+  );
+}
+
+DragDrop.propTypes = {
+  isOpen: PropTypes.bool.isRequired,
+};
+
+export default DragDrop;