Organized the settings and UI of soft inpainting to allow for toggling the feature, and centralizes default values to reduce the amount of copy-pasta.

test/test_img2img.py

@@ -1,6 +1,7 @@
 
 import pytest
 import requests
+import modules.soft_inpainting as si
 
 
 @pytest.fixture()
@@ -24,9 +25,10 @@ def simple_img2img_request(img2img_basic_image_base64):
         "inpainting_mask_invert": False,
         "mask": None,
         "mask_blur": 4,
-        "mask_blend_power": 1,
-        "mask_blend_scale": 0.5,
-        "inpaint_detail_preservation": 4,
+        "mask_blend_enabled": True,
+        "mask_blend_power": si.default.mask_blend_power,
+        "mask_blend_scale": si.default.mask_blend_scale,
+        "inpaint_detail_preservation": si.default.inpaint_detail_preservation,
         "n_iter": 1,
         "negative_prompt": "",
         "override_settings": {},