Use Heightgraph in lieu of Elevation (part V)

- fix the grade calculation
- don't show the grade labels, as they are all over (should be normalized)
- fix the display issues by overridding the heightgraph CSS

js/index.js

@@ -200,18 +200,6 @@
         }
 
         elevation = new BR.Heightgraph();
-        // Trigger the chart resize after the toggle animation is complete,
-        // in case the window was resized while the chart was not visible.
-        // The resize must be called after the animation (i.e. 'shown.bs.collapse')
-        // and cannot be called before the animation (i.e. 'show.bs.collapse'),
-        // for the container has the old width pre animation and new width post animation.
-        var container = $('#elevation-chart');
-        container.on('shown.bs.collapse', function() {
-            elevation.resize({
-                width: container.width(),
-                height: container.height()
-            });
-        });
 
         profile = new BR.Profile();
         profile.on('update', function(evt) {