fix: add padding below field title text field (#3440)

* Fixed Issue no #3426

* Reversed the pubspec.lock mistaken update

* FIXED PADDING

* Fixed Padding issue on calender field edit popup

frontend/appflowy_flutter/lib/plugins/database_view/grid/presentation/widgets/header/field_editor.dart

@@ -52,8 +52,13 @@ class _FieldEditorState extends State<FieldEditor> {
 
   @override
   Widget build(BuildContext context) {
+    final bool requireSpace = widget.onDeleted != null ||
+        widget.onHidden != null ||
+        !widget.typeOptionLoader.field.isPrimary;
+
     final List<Widget> children = [
       FieldNameTextField(popoverMutex: popoverMutex),
+      if (requireSpace) const VSpace(4),
       if (widget.onDeleted != null) _addDeleteFieldButton(),
       if (widget.onHidden != null) _addHideFieldButton(),
       if (!widget.typeOptionLoader.field.isPrimary)