damn you nemo 😒

gtk-3.20/scss/apps/_nemo.scss

@@ -100,6 +100,11 @@
                 &, & .view {
                     background-color: mix($bg_color, $base_color, .5);
                 }
+                .view:selected {
+                    &:focus, & {
+                        @extend %selected_items;
+                    }
+                }
             }
         }