feat: Control widget for enum fields (dropdown box)

Change-Id: Id762960d4a9ef6b18a5b35c5528928f32d79d248
diff --git a/dcs/config/ui/ui_create.py b/dcs/config/ui/ui_create.py
index 1499b61..da3f935 100644
--- a/dcs/config/ui/ui_create.py
+++ b/dcs/config/ui/ui_create.py
@@ -12,11 +12,13 @@
 from .base import ConfigWidget
 from .num_widget import NumWidget
 from .str_widget import StrWidget
+from .enum_widget import EnumDropdownWidget
 
 
 _CLASS_REGISTRY: List[Type[ConfigWidget]] = [
     NumWidget,
     StrWidget,
+    EnumDropdownWidget,
 ]