message: check if has some completions, not if >=0
diff: @@ -500,7 +500,7 @@ export default class MessageComposerInput extends React.Component {
  // when in autocomplete mode and selection changes hide the autocomplete.
  // Selection changes when we enter text so use a heuristic to compare documents without doing it recursively
  - if (this.autocomplete.state.completionList.length >= 0 && !this.autocomplete.state.hide &&
  + if (this.autocomplete.state.completionList.length > 0 && !this.autocomplete.state.hide &&
  this.state.editorState.document.text !== editorState.document.text &&
  !rangeEquals(this.state.editorState.selection, editorState.selection))
  {
  