Bug 117532 UI Pref to prevent sites from taking over context menu

patch by robert@accettura.com r=neil sr=ben a=mkaply

xpfe/components/prefwindow/resources/content/pref-scripts.xul

@@ -80,7 +80,7 @@
       <listitem type="checkbox" id="allowImageSrcChange" label="&allowWindowImageSrcChange.label;"
                 prefinverse="true" prefstring="dom.disable_image_src_set"/>
       <listitem type="checkbox" id="allowContextmenuDisable" label="&allowContextmenuDisable.label;"
-                prefinverse="true" prefstring="dom.event.contextmenu.enabled"/>
+                prefstring="dom.event.contextmenu.enabled"/>
     </listbox>
   </groupbox>
 

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

@@ -14,7 +14,7 @@
 <!ENTITY allowWindowFlip.label           "Raise or lower windows">
 <!ENTITY allowWindowStatusChange.label   "Change status bar text">
 <!ENTITY allowWindowImageSrcChange.label "Change images">
-<!ENTITY allowContextmenuDisable.label   "Disable a Page's Context Menu">
+<!ENTITY allowContextmenuDisable.label   "Disable or replace context menus">
 <!ENTITY allowHideStatusBar.label        "Hide the status bar">
 
 <!ENTITY enablePlugin.label              "Enable Plug-ins for">