message: use existing command hashmap over linear array search
diff: @@ -44,9 +44,9 @@ export default class CommandProvider extends AutocompleteProvider {
  let matches = [];
  if (command[0] !== command[1]) {
  // The input looks like a command with arguments, perform exact match
  - const match = COMMANDS.find((o) => o.command === command[1]);
  - if (match) {
  - matches = [match];
  + const name = command[1].substr(1); // strip leading `/`
  + if (CommandMap[name]) {
  + matches = [CommandMap[name]];
  }
  } else {
  if (query === '/') {
  