which gets added automatically by procedure_commands_get_display_args().
Move the non-interactive and run-with-last-vals code to
gimp_gegl_procedure_execute() (not execute_async()) because it makes
more sence to call it synchronously anyway (not implemented yet).
This commit should change no behavior.
Add GimpGeglProceure to keep track of recently used GEGL operations in
the filter history. The new procedure also takes care of running the
op in the GEGL tool, so filters-commands.c is almost empty now.
Change gimp-filter-history.c to find procedures by name instead of
comparing pointers.
The only thing missing now is rerunning a GEGL op with the last
settings (not just showing its UI).
