Added new information to the HTMLArea popup error when trying to use Paste

and made it translatable.

lang/en/editor.php

@@ -28,6 +28,7 @@ $string['createanchor'] = 'Create anchor';
 $string['createfolder'] = 'Create folder';
 $string['createlink'] = 'Insert Web Link';
 $string['cut'] = 'Cut selection';
+$string['cutpastemozilla'] = 'Unfortunately, you can not currently use normal keyboard shortcuts (or even the Paste button) for Pasting text into this online editor.  This is because of a security feature that is built in to some versions of Mozilla and Firefox browsers.<br /><br />There are three known workarounds you can try: <br /> (1) Instead of CTRL-v, use SHIFT-Insert <br /> (2) Use the Edit->Paste menu in your browser <br /> (3) Change the preferences in your browser by editing the user.js file. <br /><br />Click the OK button below for more help, or Cancel to return to the editor';
 $string['delete'] = 'Delete';
 $string['filebrowser'] = 'File Browser';
 $string['forecolor'] = 'Font Color';

lib/editor/htmlarea.php

@@ -1882,12 +1882,8 @@ HTMLArea.prototype.execCommand = function(cmdID, UI, param) {
             }
         } catch (e) {
             if (HTMLArea.is_gecko) {
-                if (confirm("Unprivileged scripts cannot access Cut/Copy/Paste programatically " +
-                        "for security reasons.  Click OK to see a technical note at mozilla.org " +
-                        "which shows you how to allow a script to access the clipboard." +
-                        "\n\nFor more information HOW TO enable Cut/Copy/Paste see moodle -discussion: " +
-                        "\nhttp://moodle.org/mod/forum/discuss.php?d=5880"))
-                    window.open("http://mozilla.org/editor/midasdemo/securityprefs.html");
+                if (confirm("<?php echo str_replace('<br />', '\\n', get_string('cutpastemozilla','editor')) ?>"))
+                    window.open("http://moodle.org/mozillahelp");
             }
         }
         break;