Add CXTPGridRecordItemControl::SetState

Hello Codejock!

Please add

void SetState(int nState);

AFX_INLINE void CXTPGridRecordItemControl::SetState(int nState) 
{
  m_nState = nState;
}

to CXTPGridRecordItemControl, because the current Toolkit code does state changes only based on mouse actions. We need to set the state on user code actions and this is currently not possible. In addition, the CXTPGridRecordItemControl - especially the CXTPGridRecordItemButton - is created internally in the library without any chance to attach our own CXTPGridRecordItemButton derived implementation. The same applies to the other internally used controls.

Maybe you can change this for the next release too .