Some grid/zoom tools are left in PCBNEW_CONTROL because they currently
depend on Pcbnew-specific class members. Once refactoring is done to
make it possible to use all zoom and grid controls outside of pcbnew,
these last tools can be moved to common to match their ACTIONs.
New virtual class ACTIONS is added as a member to EDA_DRAW_FRAME so
that the TOOL_DISPATCHER can have access to the appropriate derived
version of TranslateLegacyId()
This makes "rotate" into two separate TOOL_EVENTs, which each have a
"multiplier" parameter.
Also added is a namespace for 'free functions' that use TOOL_EVENT
public interfaces (perhaps with other inputs too) to centralise some
decision-making and calculations.
Fixes: lp:1660731
* https://bugs.launchpad.net/kicad/+bug/1660731