1. Mantis#0000447: Buffer overrun in Edit:ProcessKey()
2. Mantis#0000446: Wrong function to free memory in
TreeList::SaveState()
3. Mantis#0000449: Handle leak in History::ReadHistory()
4. Mantis#0000444: Bugs and memory leaks in class History
5. Mantis#0000441: Cannot delete file "Descript.ion"
Here we had an incorrect definition of virtual function
GetDizName() in panel.hpp.
Because of this, SrcPanel->GetDizName(strDizName); in ShellDelete()
didn't return anything.