Resurrect filtering of lists (playlist only for now)

src/statusbar.h

@@ -89,10 +89,22 @@ private:
 	std::vector<std::string> m_values;
 };
 
+struct ApplyFilterImmediately
+{
+	ApplyFilterImmediately(Searchable *w)
+		: m_w(w)
+	{ }
+
+	bool operator()(const char *s);
+
+private:
+	Searchable *m_w;
+};
+
 struct FindImmediately
 {
 	FindImmediately(Searchable *w, SearchDirection direction)
-	: m_w(w), m_direction(direction), m_found(true)
+		: m_w(w), m_direction(direction)
 	{ }
 
 	bool operator()(const char *s);
@@ -100,8 +112,6 @@ struct FindImmediately
 private:
 	Searchable *m_w;
 	const SearchDirection m_direction;
-	std::string m_s;
-	bool m_found;
 };
 
 struct TryExecuteImmediateCommand