Hide empty sections in budget

app/templates/budget.hbs

@@ -48,6 +48,7 @@
   </div>
 
   <div id="content">
+    {{#if this.reimbursementsUnconfirmed}}
       <section id="expenses-unconfirmed">
         <header>
           <h2>Proposed Reimbursements</h2>
@@ -56,7 +57,9 @@
           <ReimbursementList @items={{this.reimbursementsUnconfirmed}} />
         </div>
       </section>
+    {{/if}}
 
+    {{#if this.reimbursementsConfirmed}}
       <section id="expenses-confirmed">
         <header>
           <h2>Confirmed Expenses</h2>
@@ -65,6 +68,7 @@
           <ReimbursementList @items={{this.reimbursementsConfirmed}} />
         </div>
       </section>
+    {{/if}}
   </div>
 
   <div id="empty">