fix backtrace common prefix detection false positive

src/ui/single_log.rs

@@ -160,9 +160,11 @@ fn find_path_prefix_length<'a, I: Iterator<Item = &'a str>>(paths: I) -> usize {
     for path in paths {
         for pattern in patterns {
             if let Some(offset) = path.find(pattern) {
+                if !path.contains("files_external/3rdparty") {
                     return offset + 1;
                 }
             }
         }
+    }
     0
 }