Fixed-icon-alignment: Sort by arrow icon alignment issue.

Author: suryakant-krish

app/design/frontend/Magento/blank/Magento_Catalog/web/css/source/module/_toolbar.less

@@ -65,6 +65,11 @@
         .products.wrapper ~ .toolbar & {
             display: none;
         }
+
+        .sorter-action {
+            position: relative;
+            top: -2px;
+        }
     }
 
     .sorter-options {

app/design/frontend/Magento/luma/Magento_Catalog/web/css/source/module/_toolbar.less

@@ -38,7 +38,10 @@
             .lib-css(box-shadow, @button__shadow);
             border-radius: 3px;
         }
-
+        .sorter-action {
+            position: relative;
+            top: -2px;
+        }
         &-amount {
             left: 0;
             line-height: @toolbar-mode-icon-font-size + 2;