Add react-modal, replace confirm usage with it

client/js/components/modals/Confirm.js

@@ -0,0 +1,27 @@
+import React, { useCallback } from 'react';
+import withModal from 'components/modals/withModal';
+import Button from 'components/ui/Button';
+
+const Confirm = ({
+  payload: { question, confirmation, onConfirm },
+  onClose
+}) => {
+  const handleConfirm = useCallback(() => {
+    onClose(false);
+    onConfirm();
+  }, []);
+
+  return (
+    <>
+      <p>{question}</p>
+      <Button onClick={handleConfirm}>{confirmation || 'OK'}</Button>
+      <Button category="normal" onClick={onClose}>
+        Cancel
+      </Button>
+    </>
+  );
+};
+
+export default withModal({
+  name: 'confirm'
+})(Confirm);