Ui-Select css fix - single

Fix css for close action (remove item) for ui-select with multiple = false

Author: LyraGhost

app/design/adminhtml/Magento/backend/web/css/source/actions/_actions-multiselect.less

@@ -93,6 +93,19 @@
             height: @action__height + .1rem;
             top: auto;
         }
+
+        > .action-close,
+        > .action-close:active {
+            position: absolute;
+            top: 0;
+            right: 0;
+            margin-right: 3.2rem;
+            padding: 0.8rem 1.5rem 0.6rem;
+
+            &:before {
+                font-size: 1.5rem;
+            }
+        }
     }
 
     //  Multiselect inside control table