magik-session-filter-toggle-filter doesn't toggle..

[ReinhardHahn]

In Magik-session-mode you may call the function magik-session-filter-toggle-filter (With Pull request #19 or #20 integrated, you may use the pulldown menu entry "Magik-Session > Toggle... > Magik Session Filter" or the hotkey f2f, otherwise you have type M-x m-s-f-t-f).

If you do that, EMACS stops EMACS stops differentiating between user input and machine output in the (*gis*-) buffer. That is expected so far.

Not expected is the behaviour if you call the function again: It should toggle, i.e. it should switch to the normal behaviour again - but it doesn't. This should be fixed - or the function should be disabled, as I don't think, that it is often used...