improve comment

src/main.rs

@@ -56,6 +56,9 @@ fn main() {
 // 3. the user interacts with the list
 // 4. rofi sets environment variables, and calls bw-menu with the title of the selected item
 // 5. bw-menu acts based on the environment variables
+//
+// currently using the script mode so that we can pass additional info (eg the id).
+// no other mode supports this, meaning we would need to match based on the title
 fn rofi() {
     let rofi_retv = env::var("ROFI_RETV");
     let rofi_info = env::var("ROFI_INFO");