Image Carousel: Add context menu on right-click

[Giuspepe]

Testing #301610

Would be nice if when we right-click on an image in the image carousel we also get a context menu like in the regular explorer with actions like "Copy path" etc.

[bamurtaugh]

I also wanted to be able to right-click to interact further with images in the carousel (i.e. copy image or copy path to it).