DCBase

* improved program performance
* fixed columns settings
* fixed some crashes
* fixed search resuls count
* fixed loading old-styled hublists
* fixed opening userlogs from chat
* fixed ADC userlist refresh
* improved segment auto-size (DC++ SVN)
* improved transfer speed averaging (DC++ SVN)
* allow shared virtual folders to have the same name (DC++ SVN)
* fixed missing "Downloaded parts" status in queue
* Windows folder won't be shared
* some other fixes and optimizations