another attempt to get Mac OS X keyhandling right: ALTERNATIVE_DISPATCHER is off, but ALT_KEY_PRESSED_DISABLED is more careful to interpret ALT like ALT_GRAPH, which does not count as modifier here (NB: CONTROL + ALT means ALT_GRAPH on Windows, but ALT means ALT_GRAPH on Mac OS X);

more elementary key handling: listen to low-level KEY_PRESSED events (without consuming);

tuned imports;

support TAB in completion: need to configure the component with the key handler;

note to eliminate dynamic name reference

speed up generation of local theorem nicknames