Cafeteria rating widget redesign

• Show average rating with grey stars
• On tap show user rating with colored stars

@mlbn33 will provide designs soon.

First Image: No Ratings
Second Image: Previously rated, but user did not
Thrid Image: User rated, the selection is shown, not the mean.

@rapl42
Idea from Dustin: get the information from the backend if the user rated in the last 12 hours so that the frontend doesn't need to handle the state