Fix schema categories.

src/Squidex/app/shared/components/schema-category.component.html

@@ -8,7 +8,7 @@
 
         <h3>{{snapshot.displayName}} ({{snapshot.schemasFiltered.length}})</h3>
         
-        <button type="button" class="btn btn-sm btn-text-secondary float-right" *ngIf="snapshot.schemasForCategory.length === 0 && !forContent" (click)="emitRemove()">
+        <button type="button" class="btn btn-sm btn-text-secondary float-right" *ngIf="snapshot.schemasForCategory.length === 0 && snapshot.isDeletable && !forContent" (click)="emitRemove()">
             <i class="icon-bin2"></i> 
         </button>
     </div>

src/Squidex/app/shared/components/schema-category.component.ts

@@ -24,6 +24,8 @@ interface State {
     schemasFiltered: ImmutableArray<SchemaDto>;
     schemasForCategory: ImmutableArray<SchemaDto>;
 
+    isDeletable: boolean;
+
     isOpen: boolean;
 }
 
@@ -64,6 +66,7 @@ export class SchemaCategoryComponent extends StatefulComponent<State> implements
         private readonly schemasState: SchemasState
     ) {
         super(changeDetector, {
+            isDeletable: true,
             schemasFiltered: ImmutableArray.empty(),
             schemasForCategory: ImmutableArray.empty(),
             isOpen: true
@@ -104,12 +107,15 @@ export class SchemaCategoryComponent extends StatefulComponent<State> implements
 
         if (changes['name']) {
             let displayName = 'Schemas';
+            let isDeletable = true;
 
             if (this.name && this.name.length > 0) {
                 displayName = this.name;
+            } else {
+                isDeletable = false;
             }
 
-            this.next(s => ({ ...s, displayName }));
+            this.next(s => ({ ...s, isDeletable, displayName }));
         }
     }
 

src/Squidex/app/shared/services/schemas.service.spec.ts

@@ -205,7 +205,7 @@ describe('SchemasService', () => {
 
         const resource: Resource = {
             _links: {
-                updateCategory: { method: 'PUT', href: '/api/apps/my-app/schemas/my-schema/category' }
+                ['update/category']: { method: 'PUT', href: '/api/apps/my-app/schemas/my-schema/category' }
             }
         };
 

src/Squidex/app/shared/services/schemas.service.ts

@@ -310,7 +310,7 @@ export class SchemasService {
     }
 
     public putCategory(appName: string, resource: Resource, dto: UpdateSchemaCategoryDto, version: Version): Observable<SchemaDetailsDto> {
-        const link = resource._links['updateCategory'];
+        const link = resource._links['update/category'];
 
         const url = this.apiUrl.buildUrl(link.href);