regression bug due to latest changes

Author: gorhill

js/presets.js

@@ -234,9 +234,7 @@ HTTPSB.PresetManager.prototype.applyToScope = function(targetScopeKey, presetId)
         if ( scopeKey !== '*' && httpsb.temporaryScopeExists(scopeKey) === false ) {
             httpsb.createTemporaryScopeFromScopeKey(scopeKey);
             httpsb.whitelistTemporarily(scopeKey, 'main_frame', '*');
-            httpsb.whitelistTemporarily(scopeKey, 'stylesheet', '*');
-            httpsb.whitelistTemporarily(scopeKey, 'image', '*');
-            httpsb.copyTemporaryBlackRules(scopeKey, '*');
+            httpsb.copyTemporaryRules(scopeKey, '*');
         }
         rules = scopeFields[1].split(',');
         j = rules.length;

js/tab.js

@@ -495,7 +495,10 @@ HTTPSB.pageStatsFromTabId = function(tabId) {
 };
 
 HTTPSB.pageStatsFromPageUrl = function(pageUrl) {
-    return this.pageStats[pageUrl];
+    if ( pageUrl ) {
+        return this.pageStats[pageUrl];
+    }
+    return null;
 };
 
 /******************************************************************************/