Select option inconsistent space issue resolved

Author: speedy008

app/design/adminhtml/Magento/backend/web/css/styles-old.less

@@ -783,7 +783,7 @@
         box-sizing: border-box;
         border: 1px solid #adadad;
         border-radius: 1px;
-        padding: 4px;
+        padding: .6rem 1rem .6rem;
         color: #303030;
         background-color: @color-white;
         font-weight: 500;