Update styles after test

Author: mrtuvn

app/design/adminhtml/Magento/backend/Magento_Ui/web/css/source/module/_data-grid.less

@@ -227,7 +227,7 @@ body._in-resize {
         font-size: @data-grid__font-size; // Rewrite old styles. Should be deleted afterwards
         line-height: @line-height__base;
         transition: @smooth__background-color;
-        vertical-align: top;
+        vertical-align: middle;
 
         &._resizing {
             border-left: 1px solid @color-blue-pure;
@@ -391,7 +391,7 @@ body._in-resize {
     .data-grid-checkbox-cell {
         overflow: hidden;
         padding: 0;
-        vertical-align: top;
+        vertical-align: middle;
         width: @control-checkbox-radio__size + @data-grid-checkbox-cell-inner__padding-horizontal * 2;
 
         &:hover {