message: hide autocomplete when moving caret to match existing behaviour
diff: @@ -115,6 +115,15 @@ function onSendMessageFailed(err, room) {
  });
  }
  +function rangeEquals(a: Range, b: Range): boolean {
  + return (a.anchorKey === b.anchorKey
  + && a.anchorOffset === b.anchorOffset
  + && a.focusKey === b.focusKey
  + && a.focusOffset === b.focusOffset
  + && a.isFocused === b.isFocused
  + && a.isBackward === b.isBackward);
  +}
  +
  /*
  * The textInput part of the MessageComposer
  */
  @@ -469,8 +478,7 @@ export default class MessageComposerInput extends React.Component {
  }
  }
  - onChange = (change: Change, originalEditorState: value) => {
  -
  + onChange = (change: Change, originalEditorState?: Value) => {
  let editorState = change.value;
  if (this.direction !== '') {
  @@ -490,6 +498,11 @@ export default class MessageComposerInput extends React.Component {
  }
  }
  + // when selection changes hide the autocomplete
  + if (!rangeEquals(this.state.editorState.selection, editorState.selection)) {
  + this.autocomplete.hide();
  + }
  +
  if (!editorState.document.isEmpty) {
  this.onTypingActivity();
  } else {
  