Freerouting-specialized menus are removed as FreeRouting is not
maintained or packaged for most OSes. Users can still import/export
SPECCTRA files in KiCad allowing them to interface with a custom
FreeRouting installation.
Includes some dialog changes to go with the menu update.
Includes promoting the Pcbnew graphics mode back to main menu.
Includes renaming Graphics modes to Toolsets.