Allow declaring custom config input components for objects

Input components allow us to customize the config field editing experience in plugins, but due to an oversight this did not include object definitions.

packages/web_ui/src/components/BaseConfigTree.tsx

@@ -270,7 +270,7 @@ function computeTreeData(
 				children: [],
 			};
 
-			if (def.type === "object") {
+			if (def.type === "object" && !Object.keys(control.inputComponents).includes(def.inputComponent!)) {
 				let restartRequiredProps = new Set(def.restartRequiredProps || []);
 				childNode.title = <Form.Item
 					label={<>