sanitize history: Remove ':open', ':tabopen' and ':winopen' command-line history entries

According to the documentation (:help 'sanitizeitems'), when history
items are sanitized :open, :tabopen and :winopen command-line history
entries should be also removed.

CommandLine.History.sanitize() function is responsible for this but it
fails with errors. Make that function work properly.

Author: zklinger

common/content/commandline.js

@@ -1076,10 +1076,9 @@ const CommandLine = Module("commandline", {
             if (liberator.has("sanitizer") && (timespan || options["sanitizetimespan"]))
                 range = sanitizer.getClearRange(timespan || options["sanitizetimespan"]);
 
-            const self = this;
             this.store.mutate("filter", function (item) {
                 let timestamp = (item.timestamp || Date.now()/1000) * 1000;
-                return !line.privateData || timestamp < self.range[0] || timestamp > self.range[1];
+                return !item.privateData || timestamp < range[0] || timestamp > range[1];
             });
         },
         /**