New event: Right click on thumbnail or icon

Another software I am using can customize the button to click the thumbnail or icon to pop up a borderless large image of the picture or video, which does not affect the selection.
(I know that DOpus can customize some key combinations to open the standalone viewer on the thumbnail and also not affect the selection, but that is not convenient, I like this feature very much, and I hope to improve this function. :wink:)