C3C0/GravityBox — pull request #232 by MohammadAG (2013-10-31 15:02:02+00:00)
Title: Allow the volume panel to expand taking up all the space

Best way to explain this:
Before: http://i.imgur.com/2mrdoeil.png
After: http://i.imgur.com/pMZE4MGl.png

This isn't specific to Xperia devices afaik, though I've only tested it on one.