Online mortgage volume dropped from $215 billion in the second quarter to $172 billion in the third quarter, according to a new analysis by Inside Mortgage Technology. This 20 percent decline roughly matched the overall cooling off of the mortgage market during this period. Countrywide Financial continued to dominate the online origination market, accounting for a commanding 31.8 percent market share with an estimated $178.45 billion in total online volume at the end of the…