Issue 2466 - Disable element selection in all frames when showing "Block element" dialog

include.postload.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2015 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.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 247 matching lines @@
 
   // elt.parentNode.appendChild(overlay, elt);
   document.documentElement.appendChild(overlay);
   return overlay;
 }
 
 // Show dialog asking user whether she wants to add the proposed filters derived
 // from selected page element
 function clickHide_showDialog(filters)
 {
-  // If we are already selecting, abort now
-  if (clickHide_activated)
-    clickHide_rulesPending();
-
   clickHide_filters = filters;
 
   clickHideFiltersDialog = document.createElement("iframe");
   clickHideFiltersDialog.src = ext.getURL("block.html");
   clickHideFiltersDialog.setAttribute("style", "position: fixed !important; visibility: hidden; display: block !important; border: 0px !important;");
   clickHideFiltersDialog.style.WebkitBoxShadow = "5px 5px 20px rgba(0,0,0,0.5)";
   clickHideFiltersDialog.style.zIndex = 0x7FFFFFFF;
 
   // Position in upper-left all the time
   clickHideFiltersDialog.style.left = "50px";
@@ skipping 453 matching lines @@
           // e.g. if an added blocking filter matches other elements,
           // the effect won't be visible until the page is is reloaded.
           checkCollapse(currentElement.prisoner || currentElement);
 
           // Apply added element hiding filters.
           updateStylesheet();
         }
         clickHide_deactivate();
         break;
       case "clickhide-show-dialog":
+        clickHide_rulesPending();
         if (window.self == window.top)
           clickHide_showDialog(msg.clickHideFilters);
         break;
       case "clickhide-clear-last-right-click-event":
         if (lastRightClickEventValid)
           lastRightClickEventValid = false;
         else
           lastRightClickEvent = null;
         break;
     }
   });
 
   if (window == window.top)
     ext.backgroundPage.sendMessage({type: "report-html-page"});
 }