TWinSCPFileSystem::GetOpenPluginInfoEx: Add OPIF_USEATTRHIGHLIGHTING

(http://forum.farmanager.com/viewtopic.php?f=5&t=6317&start=990#p106051)
version info: update
Code style
SessionData.cpp: Improve TSessionData::AdjustHostName; RemoveProtocolPrefix
WinSCPDialogs.cpp: AdjustRemoteDir; parse username, password and directory, if any

(http://forum.farmanager.com/viewtopic.php?f=5&t=6317&start=975#p106004 )
version info: update
version info: update