Tiny change in email template.

templates/_email/base.html

@@ -13,7 +13,7 @@
       <tbody>
         <tr>
           <td style="font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif; font-size: 14px;">
-            <table width="600" align="center">
+            <table width="100%" align="center">
               <tbody>
                 <tr>
                   <td style="padding-bottom: 8px;">
@@ -26,7 +26,7 @@
                 </tr>
               </tbody>
             </table>
-            <table width="600" align="center">
+            <table width="100%" align="center">
               <tbody>
                 <tr>
                   <td style="border-top: 1px solid #DDD; padding: 12px 0px; color: #BBB;">{% if settings.email_footnote %}