align validating icon with input suffix icon

components/form/style/index.less

@@ -420,6 +420,15 @@ form {
     font-size: @form-feedback-icon-size;
     animation: zoomIn .3s @ease-out-back;
     z-index: 1;
+
+    & svg {
+      position: absolute;
+      top: 0;
+      right: 0;
+      bottom: 0;
+      left: 0;
+      margin: auto;
+    }
   }
 }