message: Call `closeParameterHints` when exiting insert mode
  Occasionally the parameter hint popup would "stick" (I'm not totally sure why), but it should close when you leave insert mode, so let's make sure that's done explicitly.
diff: @@ -404,7 +404,6 @@ class CommandEsc extends BaseCommand {
  // of vscode's default "close notification" actions. I think we should
  // just add to this list as needed.
  await Promise.all([
  - vscode.commands.executeCommand('closeParameterHints'),
  vscode.commands.executeCommand('closeReferenceSearchEditor'),
  vscode.commands.executeCommand('closeMarkersNavigation'),
  vscode.commands.executeCommand('closeDirtyDiff'),
  @@ -414,6 +413,8 @@ class CommandEsc extends BaseCommand {
  } else {
  vimState.isMultiCursor = false;
  }
  + } else if (vimState.currentMode === Mode.Insert) {
  + vscode.commands.executeCommand('closeParameterHints');
  }
  if (vimState.currentMode === Mode.EasyMotionMode) {
  