Update TinyMCE editor to v4.7.6 release

Fixes issue with double scroll bar and subsequent position of inline editing toolbar.

gui/public/tinymce/plugins/print/plugin.js

@@ -1,38 +0,0 @@
-(function () {
-var print = (function () {
-  'use strict';
-
-  var PluginManager = tinymce.util.Tools.resolve('tinymce.PluginManager');
-
-  var register = function (editor) {
-    editor.addCommand('mcePrint', function () {
-      editor.getWin().print();
-    });
-  };
-  var $_3a6e09i2jcun3ywb = { register: register };
-
-  var register$1 = function (editor) {
-    editor.addButton('print', {
-      title: 'Print',
-      cmd: 'mcePrint'
-    });
-    editor.addMenuItem('print', {
-      text: 'Print',
-      cmd: 'mcePrint',
-      icon: 'print'
-    });
-  };
-  var $_3bhp4ji3jcun3ywd = { register: register$1 };
-
-  PluginManager.add('print', function (editor) {
-    $_3a6e09i2jcun3ywb.register(editor);
-    $_3bhp4ji3jcun3ywd.register(editor);
-    editor.addShortcut('Meta+P', '', 'mcePrint');
-  });
-  var Plugin = function () {
-  };
-
-  return Plugin;
-
-}());
-})()