Color keypoints by bodypart by default

Unchecks 'Color keypoints by confidence?' by default, in the UI and in the cached examples, restoring the pre-#14 default rendering (viridis per bodypart, confidence as transparency). Confidence coloring is still available via the checkbox.

ui_utils.py

@@ -108,7 +108,7 @@ def gradio_inputs_for_MD_DLC(backends_list, md_models_list, dlc_models_list):
         )
 
         gr_color_by_confidence_checkbox = gr.Checkbox(
-            value=True,
+            value=False,
             label="Color keypoints by confidence? (otherwise by bodypart)",
         )
 
@@ -217,7 +217,7 @@ def gradio_description_and_examples():
 
     examples = [
         [image, "PyTorch", "md_v5a", "superanimal_quadruped", False, True, 0.5, 0.4, "amiko"]
-        + [font_size, "#ff0000", marker_size, True, "viridis", "#ff0000"]
+        + [font_size, "#ff0000", marker_size, False, "viridis", "#ff0000"]
         for image in (
             "examples/dog.jpeg",
             "examples/cat.jpg",