Now I use the latest version of GoldenDict Desktop of 1 September 2011 (early build). It has a new feature - a frame to the right with the list of dictionaries in which a word was found.
The problem is that it takes long for this list to appear. So, I have to use the old method of opening context menu with the list of dictionaries where the word was found. This list is available at once. Maybe the problem is because I have several online dictionaries among offline dictionaries.
The suggestion is to display offline dictionaries fast and a rotating disk for online dictionaries meaning that they are being checked. When they are available, to show them too.