Add command "edit/line/duplicate/shift_back"
Remove some unneeded forward declarations
Kill AegiFloatToString and AegiIntegerToString
Use std::begin/std::end rather than countof
Clean up vfr.cpp a little
Delete stuff for VS 2008
Cosmetics in line_iterator
Return a unique_ptr from agi::io::Open
Use a unique_ptr in agi::io::Save
Use unique_ptr for most non-wx owning pointers
Delete pre-3.0.0 hotkey migrations
Clean up the hotkey code a bit
Redesign hotkey migration logic to not rely on monotonically increasing revisions
Don't overwrite existing hotkeys in migrations
Add default hotkey for "edit/line/duplicate/shift_back"
Add "edit/line/duplicate/shift_back" to the default grid context menu