message: Put invite accept/decline buttons in correct div to align them to the right
diff: @@ -739,6 +739,7 @@ export default React.createClass({
  }
  return <div className="mx_GroupView_membershipSection mx_GroupView_membershipSection_invited">
  + <div className="mx_GroupView_membershipSubSection">
  <div className="mx_GroupView_membershipSection_description">
  { _t("%(inviter)s has invited you to join this group", {inviter: group.inviter.userId}) }
  </div>
  @@ -754,6 +755,7 @@ export default React.createClass({
  { _t("Decline") }
  </AccessibleButton>
  </div>
  + </div>
  </div>;
  } else if (group.myMembership === 'join') {
  let youAreAMemberText = _t("You are a member of this group");
  