Adding pref UI (debug pane) to control modifier and menu access keys (49909). r=matt, sr=alecf, a=asa

suite/common/pref/pref-debug.xul

@@ -36,7 +36,7 @@
     var _elementIDs = ["nglayoutDebugWindow",
                        "debugXULBoxes", "nglayoutDebugUseXBLForms", 
                        "nglayoutDebugEnableXPCOMRefcntLog", "showAboutAsStupidModalWindow",
-                       "browserEnableTBDnD"];
+                       "browserEnableTBDnD", "acceleratorKeyValue", "menuAccessKeyValue"];
   ]]>
   </script>
         
@@ -71,5 +71,31 @@
   </titledbox>              
 
 
+  <titledbox orient="vertical">
+    <label value="&accelerators.label;"/>
+    <label value="&acceleratorsBlurb.label;"/>
+
+      <grid flex="1">
+        <columns>
+          <column/>
+          <column/>
+        </columns>
+        
+        <rows>
+          <row autostretch="never">
+            <text class="label" value="&acceleratorKey.label;" for="acceleratorKeyValue"/>
+            <textbox id="acceleratorKeyValue" pref="true" preftype="int"
+              prefstring="ui.key.accelKey" prefattribute="value" size="5"/>
+          </row>
+          <row autostretch="never">
+            <text class="label" value="&menuAccessKey.label;" for="menuAccessKeyValue"/>
+            <textbox id="menuAccessKeyValue" pref="true" preftype="int"
+              prefstring="ui.key.menuAccessKey" prefattribute="value" size="5"/>
+          </row>
+        </rows>
+      </grid>
+
+  </titledbox>
+
 </window>
 

suite/locales/en-US/chrome/common/pref/pref-debug.dtd

@@ -17,4 +17,8 @@
 <!ENTITY debugWindow.label "debug window">
 <!ENTITY debugXULBox.label "debug XUL boxes">
 
-
+<!-- Accelerator Key -->
+<!ENTITY accelerators.label  "Keyboard accelerators">
+<!ENTITY acceleratorsBlurb.label  "A value of zero disables a modifier key.">
+<!ENTITY acceleratorKey.label  "Accelerator key:">
+<!ENTITY menuAccessKey.label   "Menu access key:">