Make const

src/context/contextalbumsview.cpp

@@ -418,7 +418,7 @@ void ContextAlbumsView::CopyToDevice() {
 #endif
 }
 
-void ContextAlbumsView::ShowInBrowser() {
+void ContextAlbumsView::ShowInBrowser() const {
 
   const SongList songs = GetSelectedSongs();
   QList<QUrl> urls;

src/context/contextalbumsview.h

@@ -96,7 +96,7 @@ class ContextAlbumsView : public AutoExpandingTreeView {
   void Organize();
   void CopyToDevice();
   void EditTracks();
-  void ShowInBrowser();
+  void ShowInBrowser() const;
 
  private:
   void RecheckIsEmpty();