Let ViewPages decide if they need a PageItem

src/libtomahawk/ViewPage.h

@@ -72,6 +72,12 @@ public:
     virtual bool jumpToCurrentTrack() = 0;
 
     virtual bool isTemporaryPage() const { return false; }
+
+    /**
+     * Should we add a row in the SourceTreeView for this page.
+     */
+    virtual bool addPageItem() const { return true; }
+
     /**
      * This page is actually a constant page that will be shown on every
      * restart of Tomahawk until the user selects it to be removed.

src/tomahawk/sourcetree/SourcesModel.cpp

@@ -338,6 +338,11 @@ SourcesModel::appendGroups()
 void
 SourcesModel::appendPageItem( const QString& name, ViewPage* page, int sortValue )
 {
+    // If there should be no page item, there is nothing to do for us here.
+    if ( !page->addPageItem() ) {
+        return;
+    }
+
     QModelIndex parentIndex = indexFromItem( m_browse );
     beginInsertRows( parentIndex, rowCount( parentIndex ), rowCount( parentIndex ) );
     GenericPageItem* pageItem = new GenericPageItem( this, m_browse, page->title(), page->pixmap(),