fix hitting return not creating a new block

src/components/Edit.jsx

@@ -2,12 +2,37 @@ import QuoteBlockSidebar from './Data';
 import React from 'react';
 import { SidebarPortal } from '@plone/volto/components';
 import View from './View';
+import config from '@plone/volto/registry';
 
 const Edit = (props) => {
-  const { data, block, onChangeBlock, selected } = props;
+  const {
+    data,
+    block,
+    onChangeBlock,
+    selected,
+    disableAddBlockOnEnterKey,
+    onSelectBlock,
+    onAddBlock,
+    disableEnter = false,
+  } = props;
+
+  const handleEnterKey = (e, index) => {
+    const isMultipleSelection = e.shiftKey;
+    if (e.key === 'Enter' && !disableEnter && !isMultipleSelection) {
+      if (!disableAddBlockOnEnterKey) {
+        onSelectBlock(onAddBlock(config.settings.defaultBlockType, index + 1));
+      }
+      e.preventDefault();
+    }
+  };
 
   return (
-    <div className="block quote">
+    <div
+      className="block quote"
+      onKeyDown={(e) =>
+        handleEnterKey(e, props.index, props.id, props.blockNode.current)
+      }
+    >
       <View {...props} isEditMode />
       <SidebarPortal selected={selected}>
         <QuoteBlockSidebar