change ui for left sidebar

app/views/layouts/_left_sidebar.html.erb

@@ -75,6 +75,7 @@
 				</a>
 			</li> -->
 			<%end%>
+			<li class="header"><%= t :backend %></li>
 			<li>
 				<a href="javascript:void(0);" class="menu-toggle">
 					<i class="material-icons">widgets</i>

config/locales/en.yml

@@ -70,6 +70,7 @@ en:
   sale_audits: "Sale Audits"
   bottom: "Bottom"
   payment: "Payment"
+  backend: "Backend"
 
   views:
     btn:

config/locales/mm.yml

@@ -65,6 +65,7 @@ mm:
   sale_audits: "အရောင်းပြင်ဆင်ခြင်းများ"
   bottom: "အရောင်းအနဲဆုံး"
   payment: "ငွေပေးချေမှု"
+  backend: "Backend"
   
   views:
     btn: