Nanometric work. Design rules, D_PAD (except m_Pos) is now in new units. Metric files can be loaded w/o KICAD_NANOMETRE flag set but saved only with this flag, this could help to gain some compatibility during transition process. ifdef'd code is somewhat minimized by using transition macros. Some potential code bugs are commented.

pcbnew/block_module_editor.cpp

@@ -460,7 +460,7 @@ void MoveMarkedItems( MODULE* module, wxPoint offset )
             continue;
 
         pad->SetPosition( pad->GetPosition() + offset );
-        pad->m_Pos0 += offset;
+        pad->m_Pos0 += FROM_LEGACY_LU_VEC( offset );
     }
 
     item = module->m_Drawings;
@@ -550,7 +550,7 @@ void MirrorMarkedItems( MODULE* module, wxPoint offset )
             continue;
 
         SETMIRROR( pad->GetPosition().x );
-        pad->m_Pos0.x = pad->GetPosition().x;
+        pad->m_Pos0.x = FROM_LEGACY_LU( pad->GetPosition().x );
         NEGATE( pad->m_Offset.x );
         NEGATE( pad->m_DeltaSize.x );
         pad->m_Orient      = 1800 - pad->m_Orient;
@@ -610,7 +610,7 @@ void RotateMarkedItems( MODULE* module, wxPoint offset )
             continue;
 
         ROTATE( pad->GetPosition() );
-        pad->m_Pos0    = pad->GetPosition();
+        pad->m_Pos0    = FROM_LEGACY_LU_VEC( pad->GetPosition() );
         pad->m_Orient += 900;
         NORMALIZE_ANGLE_POS( pad->m_Orient );
     }