Bugfix/62 webhook settings

[i-just]

Description

Don’t parse the webhook signing secret and ID when displaying them on the webhooks page.

Related issues

#62

[jamiepittock]

I don't think this fix is going to work.

You've fixed the form values, but now you're potentially sending an unparsed environment variable to the Stripe API to get the webhook info.

Something like this is needed...

if (!empty($webhookId)) {
    $parsedWebhookId = App::parseEnv($webhookId);
    try {
        $response = $this->getWebhookInfo($plugin, $parsedWebhookId);
        $webhookInfo = $response->toArray();
    } catch (\Exception $e) {
        Craft::error("Couldn't retrieve webhook with ID $parsedWebhookId: " . $e->getMessage());
        $hasWebhook = false;
    }
...

[i-just]

Doh... we parse other values, and even that one (when deleting a webhook by id), but I missed this instance. Additional PR raised. Thanks!