Users: Preserve role filter in list table after entering a page number in paging input.

Props kailanitish90, sagarprajapati.
Fixes #39435.

git-svn-id: https://develop.svn.wordpress.org/trunk@39937 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/users.php

@@ -509,6 +509,10 @@ if ( strlen( $usersearch ) ) {
 
 <?php $wp_list_table->search_box( __( 'Search Users' ), 'user' ); ?>
 
+<?php if ( ! empty( $_REQUEST['role'] ) ) { ?>
+<input type="hidden" name="role" value="<?php echo esc_attr( $_REQUEST['role'] ); ?>" />
+<?php } ?>
+
 <?php $wp_list_table->display(); ?>
 </form>