Raging Capital Management had its best month ever in July, with its Raging Capital Master Fund gaining 22 percent net fees and expenses, almost entirely on the back of Facebook Inc (NASDAQ:FB)’s recent rally, Opalesque reports. Many investors had been wary of Facebook which had been struggling to move its online dominance to the mobile space, but its stock has soared in the last month as it has convinced analysts that it has a solid plan for long-term growth. Raging Capital had a fine month without Facebook Inc (NASDAQ:FB), the rest of its portfolio gained 5 percent compared to the…