Fix collapse shortcut behavior

Before, the collapse shortcut was marking all articles as read when used. No matter what configuration you use.
Now, the collapse shortcut marks articles only if the appropriate configuration is used (when article is viewed).

p/scripts/main.js

@@ -373,7 +373,7 @@ function collapse_entry() {
 
 	var flux_current = $(".flux.current");
 	flux_current.toggleClass("active");
-	if (isCollapsed) {
+	if (isCollapsed && auto_mark_article) {
 		mark_read(flux_current, true);
 	}
 }