feat(ui): remove grey loader

src/app/admin/components/deleted-structures/deleted-structures.component.html

 <app-admin-nav-bar />
 <div *ngIf="isLoading" class="loader" aria-busy="true">
-  <img class="loader-gif" src="/assets/gif/loader_circle_grey.gif" alt />
+  <img class="loader-gif" src="/assets/gif/loader_circle.gif" alt />
 </div>
 <div *ngIf="!isLoading" class="adminLayout">
   <h2>Liste des structures supprimées</h2>

src/app/admin/components/lockdown-info/manage-lockdown-info.component.html

 <app-admin-nav-bar />
 <div *ngIf="isLoading" class="loader" aria-busy="true">
-  <img class="loader-gif" src="/assets/gif/loader_circle_grey.gif" alt />
+  <img class="loader-gif" src="/assets/gif/loader_circle.gif" alt />
 </div>
 <div *ngIf="!isLoading" fxLayout="column" fxLayoutAlign="center center">
   <h2>Gestion de l'affichage des infos Covid</h2>

src/app/admin/components/structures-list/admin-structures-list.component.html

 <app-admin-nav-bar />
 <div *ngIf="isLoading" class="loader" aria-busy="true">
-  <img class="loader-gif" src="/assets/gif/loader_circle_grey.gif" alt />
+  <img class="loader-gif" src="/assets/gif/loader_circle.gif" alt />
 </div>
 <div *ngIf="!isLoading" class="adminLayout" fxLayout="column" fxLayoutAlign="center center">
   <h2>Liste structures</h2>

src/app/app.component.html

@@ -2,7 +2,7 @@
 <div class="app-container">
   <div class="app-body">
     <div *ngIf="loading" class="loader" aria-busy="true">
-      <img class="loader-gif" src="/assets/gif/loader_circle_grey.gif" alt />
+      <img class="loader-gif" src="/assets/gif/loader_circle.gif" alt />
     </div>
     <ng-container *ngIf="!loading">
       <router-outlet name="left-pane" />

src/app/post/components/post-list/post-list.component.html

@@ -11,7 +11,7 @@
         </div>
       </div>
       <div *ngIf="isLoading" class="loader" aria-busy="true">
-        <img class="loader-gif" src="/assets/gif/loader_circle_grey.gif" alt />
+        <img class="loader-gif" src="/assets/gif/loader_circle.gif" alt />
       </div>
       <div *ngIf="!isLastPage && !isLoading" fxLayout="row" fxLayoutAlign="center center">
         <app-v3-button

src/app/structure/structure-join/structure-join.component.html

@@ -15,7 +15,7 @@
     </div>
   </ng-container>
   <div *ngIf="isLoading" class="loader" aria-busy="true">
-    <img class="loader-gif" src="/assets/gif/loader_circle_grey.gif" alt />
+    <img class="loader-gif" src="/assets/gif/loader_circle.gif" alt />
   </div>
   <ng-container *ngIf="!structureName && !isLoading && validationToken">
     <div class="container">