Slightly optimize selection retention

src/app.rs

@@ -1897,9 +1897,11 @@ impl App {
     }
 
     fn refresh_selection(mut self) -> Result<Self> {
-        // Should be able to select broken symlink
-        self.selection
-            .retain(|n| PathBuf::from(&n.absolute_path).symlink_metadata().is_ok());
+        self.selection.retain(|n| {
+            let p = PathBuf::from(&n.absolute_path);
+            // Should be able to retain broken symlink
+            p.exists() || p.symlink_metadata().is_ok()
+        });
         Ok(self)
     }