A French political adviser detained in Moscow last month is to remain in custody until August 5 for allegedly collecting Russian military information, after a Moscow court denied his appeal on Thursday. The man, who works for the Geneva-based Centre for Humanitarian Dialogue (HD), is an adviser on HD’s Eurasia team. He is a French national who lives in Switzerland and travels regularly for his work, HD said in a statement The Swiss-based non-governmental organization (NGO) said in June it was also seeking clarification from the Russian authorities regarding the allegations against its employee…