It is good to keep this in mind when you create lookup fields (Columns) as, there is high chance for the system added components to go unnoticed by the developers.
This is one of the limitation in editable grids. Currently, it supports only pagination, no record count or selected record count.
The IsEditable property of Canvas-App’s Date Picker control decides whether the date picker text can be edited. If false, the date can only be changed by using the calendar. Read about the date picker properties here.