Fixes permissions for motion-blocks

- Only users with permission `motions.can_manage` can remove motions from motion-block.

client/src/app/site/motions/modules/motion-block/components/motion-block-detail/motion-block-detail.component.html

@@ -33,6 +33,7 @@
     [repo]="motionRepo"
     [filterService]="filterService"
     [columns]="tableColumnDefinition"
+    [restricted]="restrictedColumns"
     [filterProps]="filterProps"
     (dataSourceChange)="onDataSourceChange($event)"
 >

client/src/app/site/motions/modules/motion-block/components/motion-block-detail/motion-block-detail.component.ts

@@ -14,6 +14,7 @@ import { MotionBlockRepositoryService } from 'app/core/repositories/motions/moti
 import { MotionRepositoryService } from 'app/core/repositories/motions/motion-repository.service';
 import { PromptService } from 'app/core/ui-services/prompt.service';
 import { ViewportService } from 'app/core/ui-services/viewport.service';
+import { ColumnRestriction } from 'app/shared/components/list-view-table/list-view-table.component';
 import { MotionBlock } from 'app/shared/models/motions/motion-block';
 import { infoDialogSettings } from 'app/shared/utils/dialog-settings';
 import { BaseListViewComponent } from 'app/site/base/base-list-view';
@@ -71,6 +72,15 @@ export class MotionBlockDetailComponent extends BaseListViewComponent<ViewMotion
             width: '40px'
         }
     ];
+    /**
+     * Restrictions for specific columns
+     */
+    public restrictedColumns: ColumnRestriction[] = [
+        {
+            columnName: 'remove',
+            permission: 'motions.can_manage'
+        }
+    ];
 
     /**
      * The form to edit blocks