If you feel like your dock bar would be better with eight apps but can’t deal with the messy look then docker may be just for you. 

Docker simply adds an extra row of icons to store yet hides the extra row until you swipe upwards on your dock to reveal the apps.

The developer states that Docker is compatible with most dock tweaks and is open source.

 

image from Cydia
 
This tweak is available for $1.99 from the BigBoss Repo.