highlight spaces between bytes when selected

src/select_grey.rs

@@ -0,0 +1,11 @@
+use ratatui::style::Color;
+
+pub trait SelectGrey {
+	fn select_grey() -> Self;
+}
+
+impl SelectGrey for Color {
+	fn select_grey() -> Self {
+		Self::Indexed(242)
+	}
+}