add updated view mode

functions.php

@@ -3143,7 +3143,11 @@
 			if ($view_mode == "unread") {
 				$view_query_part = " unread = true AND ";
 			}
-	
+
+			if ($view_mode == "updated") {
+				$view_query_part = " (last_read is null and unread = false) AND ";
+			}
+
 			if ($limit > 0) {
 				$limit_query_part = "LIMIT " . $limit;
 			} 
@@ -5437,6 +5441,9 @@
 				case "unread":
 					$message = __("No unread articles found to display.");
 					break;
+				case "updated":
+					$message = __("No updated articles found to display.");
+					break;
 				case "marked":
 					$message = __("No starred articles found to display.");
 					break;

tt-rss.php

@@ -197,6 +197,7 @@ window.onload = init;
 			<option value="marked"><?php echo __('Starred') ?></option>
 			<option value="unread"><?php echo __('Unread') ?></option>
 			<!-- <option value="noscores"><?php echo __('Ignore Scoring') ?></option> -->
+			<option value="updated"><?php echo __('Updated') ?></option>
 		</select>
 
 		<?php echo __('Order:') ?>