I looked for it in the past: No success.
Just looked again, there are thousands of ReSharper commands available in
toolbar->customize, but no "*Toggle" between
Same thing inside the "Command Window": There is
"ReSharper.ReSharper_TryProjectTransaction" but nothing in-between.
Same thing for "ReSharper_Suspend" -- it does not exist and did not exist
in the past.