Fix to bug 87195. R=eddyk, SR=sspitzer

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

@@ -1,8 +1,8 @@
 <!-- extracted from content/pref-offline.xul -->
 
 <!--LOCALIZATION NOTE : FILE The 'Offline' preferences dialog -->
-<!ENTITY window.title  "Offline and Disk Space">
-<!ENTITY boxHeader  "Offline and Disk Space">
+<!ENTITY window.title  "Offline &amp; Disk Space">
+<!ENTITY boxHeader  "Offline &amp; Disk Space">
 <!ENTITY rHeader  "Offline">
 <!--LOCALIZATION NOTE (textStart): Don't translate "&brandShortName;".
     Place "&brandShortName;" in the phrase where the name of the application should

xpfe/components/prefwindow/resources/locale/en-US/preftree.dtd

@@ -16,7 +16,7 @@
 <!ENTITY compose.label "Composer">
 <!ENTITY editing.label "New Page Settings">
 <!ENTITY publish.label "Publish">
-<!ENTITY offline.label "Offline and Disk Space">
+<!ENTITY offline.label "Offline &amp; Disk Space">
 <!ENTITY security.label "Privacy and Security">
 <!ENTITY advance.label "Advanced">
 <!ENTITY down.label "Download">