BaseList: fix page traversal on 6739i

The 6739i doesn't necessarily work with scrollup/scrolldown so add
softkeys to page through the list

Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
diff --git a/include/BaseList.class.php b/include/BaseList.class.php
index f2cd743..c60f97a 100644
--- a/include/BaseList.class.php
+++ b/include/BaseList.class.php
@@ -39,9 +39,11 @@
 		}
 		$this->setStyle('none');
 		if ($up) {
+			$this->addSoftKey(1, 'Prev', $up);
 			$this->setScrollUp($up);
 		}
 		if ($down) {
+			$this->addSoftKey(2, 'Next', $down);
 			$this->setScrollDown($down);
 		}
 		if (isset($_GET['index'])) {