Greatly appreciate the share
For others wondering, it does work with 1.7.6.5, but it just shows a little funky when you first view it. You'll want to right click the section where it shows it falling off the screen (the bulk editor window), and click inspect.
Heres a pic to follow easier:
Find this line: <div class="main-container ag-main-container prestashop-1-7-6-5" ">...</div> and click it. The CSS class pops up on the right side. The classes you're looking for are .admincombinationmaster .main-container
In the browser inspector, I changed the following CSS
float: left;
width: 100%;
TO
float: right;
width: 89%;
Then it fixes the window so you can use it (will have to do this every time you reload the page). It didn't have the functionality I needed so I didn't test too much but it appeared to work with the few things I did try.