change physics to use impulse instead of velocity

Assets/Src/UI/CrosshairComponents.cs

@@ -83,7 +83,7 @@ namespace CrosshairComponents {
             Vector2 leftArm = new Vector2(centre.x - angleSin * length, centre.y + angleSin * length);
 
             var painter = context.painter2D;
-            painter.lineWidth = 2.0f;
+            painter.lineWidth = 1.0f;
             painter.lineCap = LineCap.Butt;
             painter.strokeColor = m_TrackColor;
 
@@ -184,7 +184,7 @@ namespace CrosshairComponents {
             Vector2 bottomArm = new Vector2(centre.x, centre.y + length);
 
             var painter = context.painter2D;
-            painter.lineWidth = 2.0f;
+            painter.lineWidth = 1.0f;
             painter.lineCap = LineCap.Butt;
             painter.strokeColor = m_TrackColor;