Percentage complete in course overview on Dashboard should consider hidden or blocked activities

Hi! We just noted that the fancy donut as progress char on the dashboard (we love it!) has a problem: 

If there is some hidden or restricted activities (by groups restriction, v. gr.) the percent showed consider that activities.

To replicate: 

• Create a course with completion tracking on. 
• Setup two activities and restrict one by group
• Enter the course with a user with no group and finish the only activity displayed.
• Check the progress, it will only show a 50%

Hope we can check this out!