(fix): Re-focus the tree-node after completion of editing the name (#1945)

## Description

1. What is this PR about (link the issue and add a short description)

## Steps for reproduction

1. Use keyboard to navigate between the tree elements.
2. Click `Ctrl + E` to enter into edit mode.
3. Edit the name of the tree-node and then press `Enter`.
4. Use the up/down arrows to navigate to other nodes in the tree.

## Code Review

- [ ] hi, I need you to do
  - conceptual review (architecture, feature-correctness)
  - detailed review (read every line)
  - test it on preview

## Before requesting a review

- [x] made a self-review
- [x] added inline comments where things may be not obvious (the "why",
not "what")

## Before merging

- [x] tested locally and on preview environment (preview dev login:
5de6)
- [ ] updated [test
cases](https://github.com/webstudio-is/webstudio-builder/blob/main/apps/builder/docs/test-cases.md)
document
- [ ] added tests
- [ ] if any new env variables are added, added them to `.env.example`
and the `builder/env-check.js` if mandatory

apps/builder/app/builder/shared/tree/index.tsx

@@ -88,7 +88,7 @@ export const InstanceTree = (
       const isEditing = props.itemData.id === editingItemId;
 
       return (
-        <TreeItemBody {...props} selectionEvent="focus" isEditing={isEditing}>
+        <TreeItemBody {...props} selectionEvent="focus">
           <TreeItem
             isEditable={true}
             isEditing={isEditing}
@@ -146,7 +146,13 @@ const TreeItem = ({
   const { ref, handlers } = useContentEditable({
     isEditable,
     isEditing,
-    onChangeValue,
+    onChangeValue: (value: string) => {
+      onChangeValue(value);
+      const button = ref.current?.closest(
+        "[data-item-button-id]"
+      ) as HTMLElement;
+      button?.focus();
+    },
     onChangeEditing,
   });
 

packages/design-system/src/components/tree/tree-node.tsx

@@ -263,14 +263,12 @@ export const TreeItemBody = <Data extends { id: string }>({
   forceFocus = false,
   selectionEvent = "click",
   onToggle,
-  isEditing = false,
 }: TreeItemRenderProps<Data> & {
   children: React.ReactNode;
   suffix?: React.ReactNode;
   suffixWidth?: string;
   alwaysShowSuffix?: boolean;
   forceFocus?: boolean;
-  isEditing?: boolean;
   selectionEvent?: "click" | "focus";
 }) => {
   const [focusTarget, setFocusTarget] = useState<