added own tab

Author: nachovalera

app/code/local/Devopensource/SalesManago/etc/system.xml

@@ -1,5 +1,11 @@
 <?xml version="1.0"?>
 <config>
+    <tabs>
+        <devopenall translate="label">
+            <label><![CDATA[<div style="line-height: 28px;" >Devopensource</div>]]></label>
+            <sort_order>100000</sort_order>
+        </devopenall>
+    </tabs>
     <sections>
         <devopensalesmanago translate="label" module="devopensalesmanago">
             <label>SalesManago</label>