Fix panel scrolling randomly getting stuck.
wxWindow::Move works for all values except -1 :/
Use SetSize with wxSIZE_ALLOW_MINUS_ONE to get round this.
Copious logging lines in tpanel-aux.cpp now have their own define.
Reformat/add more in tpanel-aux.cpp.
Fix a grammatically incorrect comment.
Refactor scroll window resize handler.
Use display list, instead of dynamic_casting the child list.