fix: minor styling issues

Author: iobuhov

packages/modules/data-widgets/src/themesource/datawidgets/web/_datagrid.scss

@@ -311,7 +311,7 @@ $root: ".widget-datagrid";
     justify-content: flex-end;
     white-space: nowrap;
     align-items: baseline;
-    margin: 0 16px;
+    margin: 16px;
     color: $pagination-caption-color;
 
     .paging-status {

packages/pluggableWidgets/gallery-web/src/components/SelectionCounter.tsx

@@ -21,7 +21,7 @@ export const SelectionCounter = observer(function SelectionCounter({
                 <span className="widget-gallery-selection-count" aria-live="polite" aria-atomic="true">
                     {selectionCountStore.selectedCountText}
                 </span>
-                &nbsp;|&nbsp;
+                &nbsp;
                 <button
                     className="widget-gallery-clear-selection"
                     onClick={itemSelectHelper.onClearSelection}