Bug 677356 - Cleanup some strings [r=mbrubeck]

mobile/chrome/content/browser.xul

@@ -480,7 +480,7 @@
                     <setting pref="browser.ui.zoom.reflow" title="&reflowZoom.title;" type="bool"/>
                     <setting pref="permissions.default.image" title="&showImages.title;" type="boolint" on="1" off="2"/>
                     <setting pref="javascript.enabled" type="bool" title="&enableJavaScript.title;"/>
-                    <setting pref="browser.menu.showCharacterEncoding" type="bool" localized="true" title="&showCharset.title;"/>
+                    <setting pref="browser.menu.showCharacterEncoding" type="bool" localized="true" title="&showCharsetEncoding.title;"/>
                   </settings>
                 </richlistbox>
               </notificationbox>

mobile/locales/en-US/chrome/preferences.dtd

@@ -5,7 +5,6 @@
 <!ENTITY reflowZoom.title                          "Reformat text on zoom">
 <!ENTITY showImages.title                          "Show images">
 <!ENTITY enableJavaScript.title                    "Enable JavaScript">
-<!ENTITY enablePlugins.title                       "Enable Plugins">
 <!ENTITY privacy.title                             "Privacy &amp; Security">
 <!ENTITY allowCookies.title                        "Allow cookies">
 <!ENTITY doNotTrack.title                          "Tell sites not to track me">
@@ -20,4 +19,4 @@
 <!ENTITY homepage.none                             "Blank Page">
 <!ENTITY homepage.default                          "&brandShortName; Start">
 <!ENTITY homepage.currentpage                      "Use Current Page">
-<!ENTITY showCharset.title                         "Show Character Encoding">
+<!ENTITY showCharsetEncoding.title                 "Show character encoding">