bless a poly simple algo

src/geo/polygon.js

@@ -1428,6 +1428,13 @@
         return poly;
     };
 
+    /**
+     * shortcut to de-rez poly
+     */
+    PRO.simple = function() {
+        return this.clean(true, undefined, Math.min(CONF.clipper / 10, CONF.clipperClean * 5));
+    };
+
     /**
      * simplify and merge collinear. only works for single
      * non-nested polygons.  used primarily in slicer/connectLines.

src/mode/fdm/slice.js

@@ -94,7 +94,8 @@
         }
         // add simple (low rez poly) where less accuracy is OK
         for (let top of nutops) {
-            top.simple = top.poly.clean(true, undefined, CONF.clipper / 10);
+            // top.simple = top.poly.clean(true, undefined, CONF.clipper / 10);
+            top.simple = top.poly.simple();
         }
         data.tops = nutops;
     };