This issue has been caused by the latest updates of Chrome and Safari on Mac OS. If you have this problem please update the "Add to Ninja" bookmarklet and/or Chrome extension, that will re-adjust the height of the dialog.
To update the "Add to Ninja" bookmarklet button:
- Remove the current "Add to Ninja" bookmarklet from the Safari/Chrome bookmark bar (right mouse click on the bookmarklet button then select Delete)
- Install the new bookmarklet (drag and drop) from this page: https://www.bookmarkninja.com/installbrowserbuttons
To update the "Add to Ninja' Chrome extension:
- Right mouse click on the extension and select "Manage Extensions"
- Turn on "Developer mode" (in the top right corner)
- Click on Update