What Måns is actually referring to with hide menus button is.
http://www.TiddlyTools.com/#ToggleFullScreen
As to your original question... it really boils down to what you
consider 'publishing mode' or 'editing mode'. So maybe you might want
to define that for us more specifically and see what answers come up.
Anyways.. I believe this is not a matter of plugins, but rather of
defining / and switching templates the way you want them... e.g. to
maybe have an 'edit template' when working local and a 'published
template' for your online version.
Tobias.