Redesign the search result panel:
- added the show more logic
#86 Fix notification's choppy animation
- fixed notifications animation (added another wrapping div)
- brought the optimisations to the other related animations (set height first)
- enforce repainting boundaries (overflow hidden) when possible
- fixed box-sizing declarations technic
#85 Implement saturation filter for queue items in Firefox too
- introduced grunt-pleeease to convert webkit css filter to svg filters on the fly (for FF) and autoprefix stuffs