Fixes for review comments

Reverted icons.css to master
Removed index.html/icon-route class and modified size for SVG icon on button
Refactored RouteOpisometer.trackCell so that duplicate code is pulled outside of if blocks

icons.css

@@ -204,7 +204,6 @@
 .icon-chess-pawn:before {content:'\f443';} /* '' */
 .icon-chess-queen:before {content:'\f445';} /* '' */
 .icon-chess-rook:before {content:'\f447';} /* '' */
-/*.icon-route:before {content:'\f4d7';} /* '' */
 .icon-sign:before {content:'\f4d9';} /* '' */
 .icon-user-friends:before {content:'\f500';} /* '' */
 .icon-user-shield:before {content:'\f505';} /* '' */

index.html

@@ -1938,7 +1938,7 @@
 
           <div data-tip="Burg mean annual temperature and real-world city for comparison">
             <div class="label">Temperature:</div>
-            <span id="burgTemperature"></span>, like in 
+            <span id="burgTemperature"></span>, like in
             <span id="burgTemperatureLikeIn"></span>
           </div>
 
@@ -3099,8 +3099,8 @@
       <div id="unitsBottom">
         <button id="addLinearRuler" data-tip="Click to place a linear measurer (ruler)" class="icon-ruler"></button>
         <button id="addOpisometer" data-tip="Drag to measure a curve length (opisometer)" class="icon-drafting-compass"></button>
-        <button id="addRouteOpisometer" data-tip="Drag to measure a curve length that sticks to routes (route opisometer)" class="icon-route">
-          <svg width="1em" height="1em">
+        <button id="addRouteOpisometer" data-tip="Drag to measure a curve length that sticks to routes (route opisometer)">
+          <svg width="0.88em" height="0.88em">
             <use xlink:href="#icon-route" />
           </svg>
         </button>

modules/ui/measurers.js

@@ -333,13 +333,9 @@ class RouteOpisometer extends Measurer {
       } else if (cellStops.length > 1 && foundIndex != -1) {
         cellStops.splice(foundIndex + 1);
         this.points.splice(foundIndex + 1);
-        this.updateCurve();
-        this.updateLabel();
-       } else {
+      } else {
         cellStops.push(cell);
         this.points.push(this.getCellRouteCoord(cell));
-        this.updateCurve();
-        this.updateLabel();
       }
     } else {
       if (cellStops[0] === cell) {
@@ -347,15 +343,13 @@ class RouteOpisometer extends Measurer {
       } else if (cellStops.length > 1 && foundIndex != -1) {
         cellStops.splice(0, foundIndex);
         this.points.splice(0, foundIndex);
-        this.updateCurve();
-        this.updateLabel();
-       } else {
+      } else {
         cellStops.unshift(cell);
         this.points.unshift(this.getCellRouteCoord(cell));
-        this.updateCurve();
-        this.updateLabel();
       }
     }
+    this.updateCurve();
+    this.updateLabel();
   }
 
   getCellRouteCoord(c) {