Added timeout and debugging statuses to webhooks

- Added a user-configurable timeout option to webhooks.
- Added webhook fields for last-call/error datetime, in addition to last
  error string, which are shown on  webhook edit view.

Related to #3122

resources/lang/en/common.php

@@ -74,6 +74,7 @@ return [
     'status' => 'Status',
     'status_active' => 'Active',
     'status_inactive' => 'Inactive',
+    'never' => 'Never',
 
     // Header
     'header_menu_expand' => 'Expand Header Menu',

resources/lang/en/settings.php

@@ -246,6 +246,7 @@ return [
     'webhooks_events_warning' => 'Keep in mind that these events will be triggered for all selected events, even if custom permissions are applied. Ensure that use of this webhook won\'t expose confidential content.',
     'webhooks_events_all' => 'All system events',
     'webhooks_name' => 'Webhook Name',
+    'webhooks_timeout' => 'Webhook Request Timeout (Seconds)',
     'webhooks_endpoint' => 'Webhook Endpoint',
     'webhooks_active' => 'Webhook Active',
     'webhook_events_table_header' => 'Events',
@@ -254,6 +255,11 @@ return [
     'webhooks_delete_confirm' => 'Are you sure you want to delete this webhook?',
     'webhooks_format_example' => 'Webhook Format Example',
     'webhooks_format_example_desc' => 'Webhook data is sent as a POST request to the configured endpoint as JSON following the format below. The "related_item" and "url" properties are optional and will depend on the type of event triggered.',
+    'webhooks_status' => 'Webhook Status',
+    'webhooks_last_called' => 'Last Called:',
+    'webhooks_last_errored' => 'Last Errored:',
+    'webhooks_last_error_message' => 'Last Error Message:',
+
 
     //! If editing translations files directly please ignore this in all
     //! languages apart from en. Content will be auto-copied from en.