Add DataTable module for managing the data for the grid.
Fix test.
Implement data read from Wx Grid widget.
Fix Orders layout (Wx).
Experiment XRC
Partialy implement Order screen from XRC.
Add check for widget type before read / write (Tk).
Add corect type name for widgets for read / write (Wx);

DatePickerCtrl needs wxDP_ALLOWNONE style.
Move xrc fiel to res.
Add the files to the repo :)
Add Grid widget in code.
Fix table layout.
Remove borders from top frame.
Final layout for Orders screen (Wx).
Subclass Wx::ComboBox with params to use from XRC.

From XRC docs: Creation of the control must not be customized ???
Release v0.68.