New dedicated .epd window

[whelanh]

Based on a user request, scidCommunity now features a dedicated .epd window that opens automatically if you open a .epd file. This was a feature that used to exist in Scid, but was removed in the past. The scidCommunity window is modeled after the one in Scid vs. PC. The image below shows the dedicated window and the pop-up dialog that shows when you choose Analyze Positions. Analysis results can be stored to a text file.