I am going to throw a little curve ball at you.
I can’t figure out at all how to get the navigator widget thing working.
However, I think I much prefer this (give a tiddler as per the screenshot below a go.)
The big advantage of opening the Control Panel in a separate window (side-by-side with your TiddlyWiki) is the window with the control panel does not get impacted by the live edits you are making in the control panel.
How is this an advantage? If you do something in the panel that makes, for example, the font size so small that it is not readable, no problem. The window with the control panel is still using TiddlyWiki settings applicable at the moment the control panel was opened in the separate window.