Adds a similar crossprobe as modules has in pcbnew. When clicking a
sheet in eeschema, the items that are exclusive in that scheet will be
selected in pcbnew if using the GAL canvas.
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()
Kristoffer Ödmark
John Beard
Jon Evans