yoda: warning cleanup sweep (dead code + clippy --fix) (squashed)

Squash of 4 yoda commits:
- 84437e21 yoda: libcosmic-yoda dead-code purge (14->0 warnings)
- 999db0a4 yoda: cosmic-theme cleanup (4->0 warnings) — workspace at 0 warnings total
- 4743bb8e yoda: cargo clippy --fix on libcosmic-yoda (115->33 warnings)
- 675f3b59 chore: reduce local stack warnings

src/widget/radio.rs

@@ -262,7 +262,6 @@ where
                     if cursor.is_over(layout.bounds()) {
                         shell.publish(self.on_click.clone());
                         shell.capture_event();
-                        return;
                     }
                 }
                 _ => {}