Direct access to Favorite by "Starring" photo when in fullscreen

### Is your feature request related to a problem? Please describe.
When I want to mark a picture as favourite while viewing it in fullscreen, I have to open the menu, select Details and then I can "star" it .

### Describe the solution you'd like
It would be nice if I could star a picture directly while viewing it, without the need to open a menu etc.
I.e. similar to the Google Photos app or other galleries.

### Describe alternatives you've considered
I don't have a strong opinion on how this is implemented. I only think that it's important to star/favourite a picture directly while viewing it, without leaving the view.