QDateRangePicker: Date range picker

QDateRangePicker is a date range selection control. It wraps into a QControl the excellent Date range picker jQuery plugin from Filament Group. Almost all the properties of the original jQuery control are supported.
Example 1 shows the control with default settings.
Example 2 shows how to add new presets and preset ranges. You can use one of the many predefined ones from QDateRangePickerPresetRange, such as QDateRangePickerPresetRange::Last7Days(), or you can instantiate one in your code.
The predefined presets from QDateRangePickerPreset, such as QDateRangePickerPreset::AllDatesBefore(), can also be added or removed at will.
Example 3 shows how to use QDateRangePicker with two inputs.