Make tool strip buttons more responsive by also reaction to double left clicks

Source/Editor/GUI/ToolStripButton.cs

@@ -215,6 +215,22 @@ namespace FlaxEditor.GUI
             return base.OnMouseUp(location, button);
         }
 
+        /// <inheritdoc />
+        public override bool OnMouseDoubleClick(Float2 location, MouseButton button)
+        {
+            if(button == MouseButton.Left)
+            {
+                if (AutoCheck)
+                    Checked = !Checked;
+                Clicked?.Invoke();
+                (Parent as ToolStrip)?.OnButtonClicked(this);
+
+                return true;
+            }
+            
+            return false;
+        }
+
         /// <inheritdoc />
         public override void OnMouseLeave()
         {