3.125 (the chd V4 / 3.124 cleanup release)

fixed: crash when doing a deep-chd scan on hashed metadata
fixed: wrong rom statistic count for sets which only consists of nodump rom + chds + bios roms ;)
fixed: old type chds aren't listed when wrongly placed
fixed: "upgrade / downgrade" messages are wrong sometimes
fixed: slow down when looking for missing chds
fixed: crash when -r/-s/-h flag option is used an no warnings window is available
fixed: some md5 over sha1 priority issue which impacts the wrong placed chd detection