(New throughout, adds White House confirmation) By Karen Freifeld WASHINGTON, July 28 (Reuters) – U.S. prosecutor Thea Kendler, an attorney on the criminal case against China's Huawei and its Chief Financial Officer Meng Wanzhou, will be nominated for a Commerce Department post vital to controlling exports to China, the White House said on Wednesday. Kendler, an attorney in the Justice Department's national security division, will be nominated as assistant secretary for export administration at the Commerce Department. The nomination requires confirmation by the Senate. Kendler is expected to work under Alan Estevez, a former Pentagon official, who was nominated on…