Fix toggling optional props in Connect

When toggling an optional prop in the Connect React lib, we discard any
previously configured values. This change fixed that, so if a prop is
disabled after configuring it, re-enabling it again will use the
previoulsy configured value.

Author: jverce

packages/connect-react/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@pipedream/connect-react",
-  "version": "1.0.0-preview.17",
+  "version": "1.0.0-preview.18",
   "description": "Pipedream Connect library for React",
   "files": [
     "dist"

packages/connect-react/src/hooks/form-context.tsx

@@ -343,6 +343,11 @@ export const FormContextProvider = <T extends ConfigurableProps>({
     const idx = configurableProps.findIndex((p) => p.name === prop.name);
     if (!enabled) {
       setConfiguredProp(idx, undefined);
+    } else if (__configuredProps?.[prop.name as keyof ConfiguredProps<T>] !== undefined) {
+      setConfiguredProp(
+        idx,
+        __configuredProps[prop.name as keyof ConfiguredProps<T>],
+      );
     } else if ("default" in prop && prop.default != null) {
       setConfiguredProp(idx, prop.default);
     }