Bug 1359799 - Port bug 1359128 to TB [Change restart string in new app update UI and in the about window to 'Restart to update &brandShorterName;']. r=jorgk

mail/base/content/aboutDialog.xul

@@ -73,7 +73,7 @@
               </hbox>
               <hbox id="apply" align="center">
                 <button id="updateButton"
-                        label="&update.updateButton.label2;"
+                        label="&update.updateButton.label3;"
                         accesskey="&update.updateButton.accesskey;"
                         oncommand="gAppUpdater.buttonRestartAfterDownload();"/>
                 <spacer flex="1"/>

mail/locales/en-US/chrome/messenger/aboutDialog.dtd

@@ -8,7 +8,7 @@
 -->
 <!ENTITY update.checkForUpdatesButton.label       "Check for Updates">
 <!ENTITY update.checkForUpdatesButton.accesskey   "C">
-<!ENTITY update.updateButton.label2               "Restart &brandShortName; to Update">
+<!ENTITY update.updateButton.label3               "Restart to update &brandShorterName;">
 <!ENTITY update.updateButton.accesskey            "R">