Reimplement category chart.

src/operations/operations.html

@@ -20,7 +20,11 @@
     <div class="col-md-9">
       <balance-chart on-update="operationsCtrl.onUpdate(minDate, maxDate)"/>
     </div>
-    <div class="col-md-3"></div>
+    <div class="col-md-3">
+      <category-chart
+        min-date="operationsCtrl.minDate"
+        max-date="operationsCtrl.maxDate"/>
+    </div>
   </div>
 
   <div class="row">