viewlet fixes (#7934)

Signed-off-by: Denis Bykhov <bykhov.denis@gmail.com>

plugins/view-resources/src/components/ViewletContentView.svelte

@@ -42,11 +42,12 @@
       (res) => {
         configurationRaw = res
         configurationsLoading = false
+        loading = configurationsLoading || preferencesLoading
       }
     )
   }
 
-  function fetchPreferences (viewlet: Viewlet): void {
+  function fetchPreferences (configurationRaw: Viewlet[]): void {
     preferencesLoading = preferenceQuery.query(
       view.class.ViewletPreference,
       {
@@ -56,6 +57,7 @@
       (res) => {
         preference = res
         preferencesLoading = false
+        loading = configurationsLoading || preferencesLoading
       }
     )
   }
@@ -81,7 +83,7 @@
   }
 
   $: fetchConfigurations(viewlet)
-  $: fetchPreferences(viewlet)
+  $: fetchPreferences(configurationRaw)
 
   $: updateConfiguration(configurationRaw, preference)
 
@@ -90,6 +92,8 @@
 
 {#if viewlet?.$lookup?.descriptor?.component}
   {#if loading}
+    {configurationsLoading}
+    {preferencesLoading}
     <Loading />
   {:else}
     <Component