Fix user card length on supporter store page

Author: nanaya

resources/css/bem/store-supporter-tag.less

@@ -20,9 +20,8 @@
   &__user-search {
     display: grid;
     grid-gap: 5px;
-    grid-template-columns: minmax(@user-card-width, 1fr);
-
-    justify-content: center;
+    max-width: @user-card-width * 1.2;
+    margin: 0 auto;
   }
 
   .ui-slider {