Revert "Merge pull request #699 from jockri/fix-background-filter"
Revert "Merge pull request #699 from jockri/fix-background-filter"

This reverts commit 417a2d594ea05f0cf963dfee94331a49a2c4e14e, reversing
changes made to 40e98ef72acfd36e00a5843c1e58c73a460dc4c6.

prolixtechnikos/LiipImagineBundle,prolixtechnikos/LiipImagineBundle,liip/LiipImagineBundle,robfrawley/LiipImagineBundle,prolixtechnikos/LiipImagineBundle,liip/LiipImagineBundle,robfrawley/LiipImagineBundle