By Chris Prentice WASHINGTON (Reuters) -The U.S. Securities and Exchange Commission’s scrutiny of how Wall Street handles work-related communications on personal devices and apps such as WhatsApp has expanded beyond broker-dealers to investment funds and advisers, according to four people familiar with the inquiry. Late last month, the SEC and the Commodity Futures Trading Commission (CFTC) fined 16 financial firms, including large banks such as Goldman Sachs Group Inc and Morgan Stanley, a combined $1.8 billion after staff discussed deals and trades on their personal devices and apps, in a sw…