By resetting the course start date in the reset form, teachers can also reset dates associated with activities.

However, activity open/close/due dates do not reflect in the course page after resetting the course start date.  They keep unchanged until the settings of one of the activities are saved.

Activity access restriction dates correctly reflect the change immediately after resetting.

Reproduction Steps:

1. Create a course starting on 18 Jan.
2. Add three activities opens/closes at 9am/9pm on 18, 19, and 20 Jan. with access restrictions at 8am on the same days.
3. Reset the course start date to 28 Jan.
4. You see new activity restriction dates are correctly displayed but open/close dates are not on the course page.
5. You also see activity open/close dates are correctly changed in the settings page.
6. After saving the settings of one of the activities without any change, you see all activity dates are correctly displayed on the course page.