Improved Achievement Progress Label

Label now appears atop the progress bar and reports the progress as the formatted text returned by rcheevos instead of a simple percentage.

Source/Core/DolphinQt/Achievements/AchievementBox.h

@@ -25,6 +25,7 @@ private:
   QLabel* m_badge;
   QLabel* m_status;
   QProgressBar* m_progress_bar;
+  QLabel* m_progress_label;
 
   rc_client_achievement_t* m_achievement;
 };