[Feature Request] Delete files from within the program

[ZephyrSnoww]

Just started using the software, and a major thing I use software like this for is for deleting unwanted files from my PC - adding an option in the right click menu (or otherwise) to delete the selected files, would be immensely helpful.

[cutekita]

I agree with this, currently I use qView as my image viewer, which lets me click on the bigger preview on the right and rightclick in qView to delete an image acceptably quick, until this is a built in feature, I think that is a good alternative

[CyanVoxel]

Added in #282 and expanded upon in #409