Add a library selector to the save dialog. Initialize it to the
footprint's library. This way a straigh-up save will do what's
expected.
However, the user can still select the active library (or any
other library) if they really did want to move the footprint.
Fixes: lp:1750918
* https://bugs.launchpad.net/kicad/+bug/1750918
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.
Jeff Young
jean-pierre charras