Fix selecting broken symlink

src/app.rs

@@ -2424,8 +2424,9 @@ 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).exists());
+            .retain(|n| PathBuf::from(&n.absolute_path).symlink_metadata().is_ok());
         Ok(self)
     }