Only rate titles with more than 30 seconds

src/main.rs

@@ -301,6 +301,7 @@ fn duration_as_str(duration: &Duration) -> String {
 fn session_stats_as_vec(session_stats: &HashMap<Rc<String>, Duration>) -> Vec<SessionRating> {
     let mut stats: Vec<_> = session_stats
         .iter()
+        .filter(|(_, duration)| duration.as_secs() > 30)
         .map(|(title, duration)| SessionRating {
             window_title: title.clone(),
             duration: duration.clone(),