Fix pin rotatation and SPICE current probe statement for 2-pin symbols

Fixes: lp:1843159
* https://bugs.launchpad.net/kicad/+bug/1843159

eeschema/sch_pin.cpp

@@ -125,7 +125,8 @@ const EDA_RECT SCH_PIN::GetBoundingBox() const
     TRANSFORM t = GetParentComponent()->GetTransform();
     EDA_RECT  r = m_libPin->GetBoundingBox();
 
-    t.y2 = -t.y2;
+    r.RevertYAxis();
+
     r = t.TransformCoordinate( r );
     r.Offset( GetParentComponent()->GetPosition() );
 

eeschema/tools/sch_editor_control.cpp

@@ -469,7 +469,12 @@ int SCH_EDITOR_CONTROL::SimProbe( const TOOL_EVENT& aEvent )
             {
                 SCH_PIN*       pin = (SCH_PIN*) item;
                 SCH_COMPONENT* comp = (SCH_COMPONENT*) item->GetParent();
-                wxString       param = wxString::Format( _T( "I%s" ), pin->GetName().Lower() );
+                wxString       param;
+
+                if( comp->GetPins().size() <= 2 )
+                    param = wxT( "I" );
+                else
+                    param = wxString::Format( wxT( "I%s" ), pin->GetName().Lower() );
 
                 simFrame->AddCurrentPlot( comp->GetRef( g_CurrentSheet ), param );
             }