Updated navbar icon.

src/Main.elm

@@ -175,7 +175,7 @@ viewNav ( global, _ ) =
             , button [ activeClass DataTable |> Html.Attributes.class, ViewChange DataTable |> onClick ]
                 [ i [ Html.Attributes.class "fa-solid fa-table fa-xl" ] [] ]
             , button [ activeClass ForceDirectedGraph |> Html.Attributes.class, ViewChange ForceDirectedGraph |> onClick ]
-                [ i [ Html.Attributes.class "fa-solid fa-poo fa-xl" ] [] ]
+                [ i [ Html.Attributes.class "fa-solid fa-hexagon-nodes fa-xl" ] [] ]
             , button [ activeClass BarPlot |> Html.Attributes.class, ViewChange BarPlot |> onClick ]
                 [ i [ Html.Attributes.class "fa-solid fa-chart-simple fa-xl" ] [] ]
             , button [ activeClass LinePlot |> Html.Attributes.class, ViewChange LinePlot |> onClick ]