message: Fix autocompletion of Community IDs
diff: @@ -186,7 +186,7 @@ abstract class PlainBasePart extends BasePart {
  }
  // when not pasting or dropping text, reject characters that should start a pill candidate
  if (inputType !== "insertFromPaste" && inputType !== "insertFromDrop") {
  - return chr !== "@" && chr !== "#" && chr !== ":";
  + return chr !== "@" && chr !== "#" && chr !== ":" && chr !== "+";
  }
  return true;
  }
  @@ -463,6 +463,7 @@ export class PartCreator {
  case "#":
  case "@":
  case ":":
  + case "+":
  return this.pillCandidate("");
  case "\n":
  return new NewlinePart();
  