Remove selection from grid before deleting rows.

eeschema/dialogs/dialog_symbol_properties.cpp

@@ -597,6 +597,7 @@ void DIALOG_SYMBOL_PROPERTIES::OnEditSpiceModel( wxCommandEvent& event )
         {
             m_fields->erase( m_fields->begin() + ii );
             wxGridTableMessage msg( m_fields, wxGRIDTABLE_NOTIFY_ROWS_DELETED, ii, 1 );
+            m_fieldsGrid->ClearSelection();
             m_fieldsGrid->ProcessTableMessage( msg );
         }
     }