Also adds Cancel context menu items for Place Footprint,
Place Target, Place Drill Origin and Place Grid Origin tools,
as well as the standard Zoom and Grid choices.
Removes the Paste context menu item from the Place Drill
and Place Grid Origin tools.
Fixes: lp:1568396
* https://bugs.launchpad.net/kicad/+bug/1568396
- added selection of reference point
- added snapping when pasting
- some minor code refactoring
- disabled pasting between footprint and pcb editors due to model incompatibility
- added TOOL_INTERACTIVE::resetTransitions()
- made protected and moved TOOL_BASE::setTransitions() to TOOL_INTERACTIVE
- TOOL_MANAGER calls TOOL_INTERACTIVE::resetTransitions() instead of
setTransitions()
Jeff Young
Tomasz Włostowski
Maciej Suminski
Simon Richter