Currently there is no solution for that other than build yourself that's why it's still on the list of things to built.

For anyone else stumbling upon this thread, here's my crude way of bulk editing content.

Simply paste this into a template, locally, run it once and remove. (or some other way you choose, the result is the same)

@using Umbraco.Core;
@using Umbraco.Core.Models;
@using Umbraco.Core.Services;
@using System.Linq;

// Select the pages you want to edit (this is a custom doctype)
var posts = Model.Descendants<Blogpost>("blogpost").ToList();

// Get the content service for manipulating the content
IContentService cs = Services.ContentService;

// Get the content as IContent
IEnumerable<IContent> cList = cs.GetByIds(posts.Select(x => x.Id));

// Loop over and save
foreach (IContent cNode in cList)
{
    // Set the new values here
    cNode.SetValue("umbracoNaviHide", false);

    // Save || SaveAndPublish the node
    cs.SaveAndPublish(cNode);
}

Query the pages you want to edit however you want, add the properties you'd like to edit, and voila.

REMEMBER: If you have a lot of nodes, this can take quite a while, as it queries the database for each node (to save and publish). You may wanna filter the results, and take a backup of your database before you begin.

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