Dev: Allow beforeEmail events to update core replacement (#2611)

Dev: sample : EXPIRY on user language, MESSAGE from user in place of SURVEYDESCRIPTION

application/core/LimeMailer.php

@@ -863,7 +863,7 @@ public function doReplacements($string)
                 }
             }
         }
-        $aReplacements = array_merge($this->aReplacements, $aReplacements);
+        $aReplacements = array_merge($aReplacements, $this->aReplacements);
         return LimeExpressionManager::ProcessString($string, null, $aReplacements, 3, 1, false, false, true);
     }