fix(ctm): disable lead sign indicator

public/views/mp/ctm.html

@@ -145,6 +145,7 @@
 						preview_pixel_size: 2,
 						preview_align: 'tr',
 						stereo: translate([1, 2], [-1, 1], num),
+						plus_minus_lead_indicator: 0,
 					}
 				);