Issue 1670 - Removed "Hide placeholders" option from the UI (Firefox)

chrome/content/ui/overlay.xul

 <?xml version="1.0"?>
 
 <!--
   - This file is part of Adblock Plus <http://adblockplus.org/>,
   - Copyright (C) 2006-2014 Eyeo GmbH
   -
   - Adblock Plus is free software: you can redistribute it and/or modify
   - it under the terms of the GNU General Public License version 3 as
   - published by the Free Software Foundation.
   -
@@ skipping 41 matching lines @@
     <menuitem id="abp-status-closebottombar" label="&closesidebar.label;" key="abp-key-sidebar" command="abp-command-sidebar"/>
     <menuitem id="abp-status-filters" label="&filters.label;…" key="abp-key-filters" command="abp-command-filters"/>
     <menuseparator id="abp-status-whitelist-sep"/>
     <menuitem id="abp-status-whitelistsite" labeltempl="&whitelist.site.label;" type="checkbox" command="abp-command-togglesitewhitelist"/>
     <menuitem id="abp-status-whitelistpage" label="&whitelist.page.label;" type="checkbox" command="abp-command-togglepagewhitelist"/>
     <menuitem id="abp-status-disabled" label="&disable.label;" type="checkbox" key="abp-key-enable" command="abp-command-enable"/>
     <menuseparator/>
     <menu id="abp-status-options" label="&options.label;">
       <menupopup id="abp-status-options-popup">
         <menuitem id="abp-status-frameobjects" label="&objecttabs.label;" type="checkbox" command="abp-command-toggleobjtabs"/>
-        <menuitem id="abp-status-slowcollapse" label="&hideplaceholders.label;" type="checkbox" command="abp-command-togglecollapse"/>
         <menuitem id="abp-status-savestats" label="&counthits.label;" type="checkbox" command="abp-command-togglesavestats"/>
         <menuitem id="abp-status-sync" label="&sync.label;" type="checkbox" command="abp-command-togglesync"/>
         <menuseparator id="abp-status-iconSettingsSeparator"/>
         <menuitem id="abp-status-showintoolbar" label="&showintoolbar.label;" type="checkbox" command="abp-command-toggleshowintoolbar"/>
         <menuitem id="abp-status-showinstatusbar" label="&showinstatusbar.label;" type="checkbox" command="abp-command-toggleshowinstatusbar"/>
       </menupopup>
     </menu>
 
     <hbox class="abp-contributebutton" id="abp-status-contributebutton" pack="center" align="center">
       <!-- noautoclose attribute tells Australis menu that it shouldn't close when
            these are clicked, see https://bugzilla.mozilla.org/show_bug.cgi?id=940693 -->
       <button class="abp-contributebutton-btn" label="&contribute.label;" command="abp-command-contribute" flex="1" noautoclose="true"/>
       <toolbarbutton class="abp-contributebutton-close" command="abp-command-contribute-hide" noautoclose="true"/>
     </hbox>
   </menupopup>
 
   <keyset id="abp-keyset"/>
 
   <!-- Dummy oncommand attributes are work-arounds for bug 371900 -->
   <commandset id="abp-commandset">
     <command id="abp-command-sendReport" oncommand="//"/>
     <command id="abp-command-filters" oncommand="//"/>
     <command id="abp-command-settings" oncommand="//"/>
     <command id="abp-command-sidebar" oncommand="//"/>
     <command id="abp-command-togglesitewhitelist"/>
     <command id="abp-command-togglepagewhitelist"/>
     <command id="abp-command-toggleobjtabs"/>
-    <command id="abp-command-togglecollapse"/>
     <command id="abp-command-togglesavestats"/>
     <command id="abp-command-togglesync"/>
     <command id="abp-command-toggleshowintoolbar"/>
     <command id="abp-command-toggleshowinstatusbar"/>
     <command id="abp-command-enable" oncommand="//"/>
     <command id="abp-command-contribute"/>
     <command id="abp-command-contribute-hide"/>
   </commandset>
 
   <statusbarpanel id="abp-status" class="statusbarpanel-iconic"
@@ skipping 24 matching lines @@
     xmlns:html="http://www.w3.org/1999/xhtml">
     <label id="abp-notification-title" class="header"/>
     <html:p id="abp-notification-message"/>
     <hbox id="abp-notification-question">
       <button id="abp-notification-yes" label="&notification.button.yes;"/>
       <button id="abp-notification-no" label="&notification.button.no;"/>
       <toolbarbutton id="abp-notification-close" label="&notification.button.close;"></toolbarbutton>
     </hbox>
   </panel>
 </overlay>