title: DataGridTemplateColumn with DatePicker requires three clicks to edit the date
body: <p>I have a <code>DataGridTemplateColumn</code>. Inside its <code>CellEditingTemplate</code>, I put a <code>DatePicker</code> control. Now if I want to edit the date, I have to click three times to let <code>DatePicker</code> begin editing. Can someone let me know how I can get <code>DatePicker</code> into edit mode with only two clicks? Also, if <code>DataGridTemplateColumn</code> get focused, keyboard typing doesn't put <code>DatePicker</code> into edit mode as well. It would be nice if it can be fixed as well.</p>