FileProvider/app/src/main/java/com/example/graygallery/ui/AppViewModel.kt (3 lines):
	- line 99: // TODO: Apply grayscale filter before saving image
	- line 116: // TODO: Apply grayscale filter before saving image
	- line 154: // TODO: Make the function suspend


FileProvider/app/src/main/java/com/example/graygallery/ui/GalleryFragment.kt (1 line):
	- line 71: // TODO: Add popup menu https://material.io/develop/android/components/menu/