add some missing entities

xpfe/components/prefwindow/resources/locale/en-US/pref-composer.dtd

@@ -5,7 +5,7 @@
 <!--LOCALIZATION NOTE (title.label): DONT_TRANSLATE -->
 <!ENTITY  title.label               "Composer">
 <!ENTITY  lHeader                   "Composer">
-<!ENTITY  rHeader                   "Settings for authoring of new Web pages">
+<!ENTITY  rHeader                   "Settings for authoring of new web pages">
 
 <!ENTITY  tableEditing.label                    "Table Editing">
 
@@ -16,4 +16,7 @@
 <!ENTITY  deleteCell.label                      "delete cell (content and structure)">
 <!ENTITY  deleteCell.accesskey                  "s">
 <!ENTITY  deleteContent.label                   "delete only cell content">
-<!ENTITY  deleteContent.accesskey               "c">
+<!ENTITY  deleteContent.accesskey               "c">
+
+<!ENTITY  AutoSaveCheck             "Automatically save every">
+<!ENTITY  minText                   "minutes">