Fix for nsbeta2+ bug 31134 -- paste in edit menu not enabled correctly. Add a new command set for clipboard-related menu items, and fire it on Copy. Also ensure that Undo/Redo commands are updated correctly, and avoid bogus command updating in plain text compose (since that caused JS errors). r=kin,jfrancis.

suite/debugQA/content/debugQATextEditorShell.xul

@@ -54,8 +54,9 @@
     <commandset id="globalEditMenuItems"/>
     <commandset id="selectEditMenuItems"/>
     <commandset id="undoEditMenuItems"/>
+	<commandset id="clipboardEditMenuItems"/>
 
-    <commandset id="composerMenuItems"/>
+    <commandset id="commonEditorMenuItems"/>
     <commandset id="composerEditMenuItems"/>
     <commandset id="composerSaveMenuItems"/>    
   </commands>
@@ -111,7 +112,7 @@
       <button id="newButton"/>
       <button id="openButton"/>
       <button id="saveButton"/>
-      <toolbarseparator/>
+      <spring class="separator_small"/>
       <button id="printButton"/>
       <button id="findButton"/>
       <button id="spellingButton"/>