Disable hideous Android notification menu flip animation?

I love my Google Play edition HTC One, and with animations turned off everything is very quick to load, except for one thing.

When you pull down the notification menu and press the button in the top right hand corner, Android does this hideous flip animation that looks like a slide transition straight out of power-point 2003. Having the screen do a 180 degree flip pivoted vertically down the centre is one of my least favoured animations, not to mention that it is also painfully slow.

So my question is, does anyone know how to get rid of this. My phone is rooted and I am happy to change to CM11 if that helps.