:bug: fixing sortBy check typo

vue-theme/src/pages/list.vue

@@ -198,7 +198,7 @@ export default {
 
             // Always unset and reset the intersection loader
             this.unsetIntersectionLoader()
-            if(!this._getSortBy() != sortTypes.material) {
+            if(this._getSortBy() != sortTypes.material) {
                 this.setIntersectionLoader()
             }
         }