Set up regular links for adding application.

src/types/object.rs

@@ -85,6 +85,7 @@ pub struct RegularLink<'s> {
     pub raw_link: Cow<'s, str>,
     pub search_option: Option<Cow<'s, str>>,
     pub children: Vec<Object<'s>>,
+    pub application: Option<Cow<'s, str>>,
 }
 
 #[derive(Debug, PartialEq)]