Update app.py

app.py

@@ -310,15 +310,15 @@ class Engine(object):
                 icon='star',
                 border_color='red',
                 border_width=10,
+                inner_icon_style='color:blue;font-size:20px;margin-top:0;',
+                background_color='transparent',
+                border_color='transparent',
             )
             feature_group = FeatureGroup(name='Ground Truth')
             Marker(
                 location=[true_lat, true_lon],
                 popup="True location",
                 icon=icon_star,
-                inner_icon_style='color:blue;font-size:20px;',
-                background_color='transparent',
-                border_color='transparent',
             ).add_to(feature_group)
             map.add_child(feature_group)