Add filter index for ID column in adminhtml user grid

Author: Jeroen

app/code/Magento/User/view/adminhtml/layout/adminhtml_user_grid_block.xml

@@ -36,6 +36,7 @@
                             <argument name="index" xsi:type="string">user_id</argument>
                             <argument name="column_css_class" xsi:type="string">col-id</argument>
                             <argument name="header_css_class" xsi:type="string">col-id</argument>
+                            <argument name="filter_index" xsi:type="string">main_table.user_id</argument>
                         </arguments>
                     </block>
                     <block class="Magento\Backend\Block\Widget\Grid\Column" name="permission.user.grid.columnSet.username" as="username">