remove lazy load for page with only relation manager or widget (#1521)

some pages are using widget & relation manager as the only
section/component in the page, and with the lazy load enabled by default
in Filament, this causes those pages to be empty on initial load and
have slight flicker

packages/admin/src/Filament/Resources/ProductResource/RelationManagers/CustomerGroupRelationManager.php

@@ -10,6 +10,8 @@
 
 class CustomerGroupRelationManager extends RelationManager
 {
+    protected static bool $isLazy = false;
+
     protected static string $relationship = 'customerGroups';
 
     public function isReadOnly(): bool

packages/admin/src/Filament/Resources/ProductResource/Widgets/ProductOptionsWidget.php

@@ -39,6 +39,8 @@ class ProductOptionsWidget extends BaseWidget implements HasActions, HasForms
 
     public bool $configuringOptions = false;
 
+    protected static bool $isLazy = false;
+
     public function mount()
     {
         $this->configureBaseOptions();

packages/admin/src/Support/RelationManagers/ChannelRelationManager.php

@@ -11,6 +11,8 @@
 
 class ChannelRelationManager extends RelationManager
 {
+    protected static bool $isLazy = false;
+
     protected static string $relationship = 'channels';
 
     public function isReadOnly(): bool

packages/admin/src/Support/RelationManagers/MediaRelationManager.php

@@ -15,6 +15,8 @@
 
 class MediaRelationManager extends RelationManager
 {
+    protected static bool $isLazy = false;
+
     protected static string $relationship = 'media';
 
     public string $mediaCollection = 'default';