[BUGFIX] URL router can fail at high load

lib/proportions.js

@@ -60,7 +60,7 @@ define(['d3-interpolate', 'snabbdom', 'utils/version', 'filters/genericnode', 'h
 
           var filter = new Filter(_.t(name), d[2], d[0], d[3]);
 
-          var a = V.h('a', { props: { href: '#' }, on: { click: addFilter(filter) } }, d[0]);
+          var a = V.h('a', { on: { click: addFilter(filter) } }, d[0]);
 
           var th = V.h('th', a);
           var td = V.h('td', V.h('span', {

scss/modules/_proportion.scss

@@ -22,4 +22,8 @@
     min-width: 1.5em;
     padding: .25em .5em;
   }
+
+  a {
+    cursor: pointer;
+  }
 }