Dashboard Triangle symbol

When the sample application html is saved and opened from local file, the Dashboard triangles (e.g. Row Styling) becomes: â-¶ unexpanded, â-¼ expanded.

Adding the following tag after the head tag fixes it:
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Saving from the web browser will also add it in (don't need the other style tags it adds: injected-stylesheet-filter-tree-base and injected-stylesheet-finbar-base)