New in FL Studio 12.5
Playlist Picker Panel (Alt+P) - Lists all Pattern, Audio and Automation Clips in the project.
Useful features include: Select unused Clips. Select Clips in Playlist.
Render Pattern Clips to Audio Clips (Right-Click Clips > Render as audio clip, hold (Alt) to bypass Mixer Insert FX).

この辺の使い勝手が良ければいいな〜