ACP2E-557: Admin product grid: column's width stretches instead of word wrapping

- Updated _data-grid.less file with "pre-wap" value instead of just "pre"

Author: Mohan Ahuja

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

@@ -71,7 +71,7 @@
     width: 100%;
 
     &.white-space-preserved {
-        white-space: pre;
+        white-space: pre-wrap;
     }
 }