Fix unarr detection on Linux systems that use qmake without pkg-config support

YACReaderLibrary/empty_reading_list_widget.cpp

@@ -0,0 +1,9 @@
+#include "empty_reading_list_widget.h"
+
+EmptyReadingListWidget::EmptyReadingListWidget(QWidget *parent)
+    :EmptyContainerInfo(parent)
+{
+    setUpDefaultLayout(true);
+    setPixmap(QPixmap(":/images/empty_reading_list"));
+    setText(tr("This reading list does not contain any comics yet"));
+}