message: use generic 'text button' for delete buttons in UserSettings
diff: @@ -205,7 +205,7 @@ const IgnoredUser = React.createClass({
  render: function() {
  return (
  <li>
  - <AccessibleButton onClick={this._onUnignoreClick} className="mx_UserSettings_button mx_UserSettings_buttonSmall">
  + <AccessibleButton onClick={this._onUnignoreClick} className="mx_textButton">
  { _t("Unignore") }
  </AccessibleButton>
  { this.props.userId }
  