Add HorizontalLine to Title attribute

Author: vanifatovvlad

Editor.Extras/Drawers/TitleDrawer.cs

@@ -63,7 +63,11 @@ public override void OnGUI(Rect position, TriProperty property, TriElement next)
 
             var title = _titleResolver.GetValue(property, "Error");
             GUI.Label(titleRect, title, EditorStyles.boldLabel);
-            EditorGUI.DrawRect(lineRect, Color.gray);
+
+            if (Attribute.HorizontalLine)
+            {
+                EditorGUI.DrawRect(lineRect, Color.gray);
+            }
 
             next.OnGUI(contentRect);
         }

Runtime/Attributes/TitleAttribute.cs

@@ -8,6 +8,7 @@ namespace TriInspector
     public sealed class TitleAttribute : Attribute
     {
         public string Title { get; }
+        public bool HorizontalLine { get; set; } = true;
 
         public TitleAttribute(string title)
         {