Draw impulse/ execution lines thicker than data ones

Slightly increases the thickness of impulse/ execution lines for node editors to make it easier for the user to follow execution flow (and indirectly also data flow)

Source/Editor/Surface/Elements/OutputBox.cs

@@ -202,6 +202,12 @@ namespace FlaxEditor.Surface.Elements
                     highlight += DefaultConnectionThickness * 0.5f;
                 }
 
+                // Increase thickness on impulse/ execution lines
+                if (targetBox.CurrentType.IsVoid)
+                {
+                    highlight += 1.25f;
+                }
+                
                 DrawConnection(style, ref startPos, ref endPos, ref color, highlight);
             }
         }