# Preparations
# login to Admin Console
# go to {nav Custom > Widgets} section
# add some records
# Part 1 (date field change)
# login to Admin Console
# go to {nav Custom > Widgets} section
# use `Export` button on toolbar to export all grid data
# confirm, that CSV file was sent back to user and it contains all data shown in grid
# open downloaded CSV file
# change values in all columns but `ID` and `Image` into another valid values
# use `Import` button in grid to import back changed file
# confirm, that all changes made in CSV file as shown in grid
# Part 2 (date and time field change)
# go to IDE
# open `/modules/custom/units/widgets/widgets_config.php` file for editing
# in the `CreatedOn` field declaration comment out lines that change `format` and `input_format` field options
# login to Admin Console
# go to {nav Custom > Widgets} section
# use `Export` button on toolbar to export all grid data
# confirm, that CSV file was sent back to user and it contains all data shown in grid
# open downloaded CSV file
# change values in all columns but `ID` and `Image` into another valid values
# use `Import` button in grid to import back changed file
# confirm, that all changes made in CSV file as shown in grid