[CLIENT] Patcher GPU performance regression

DESCRIPTION The launcher pins GPU usage up to ~100% when updating (i.e. scanning for differences, downloading and applying patches but not when merely launching the game). At a random guess, this is probably the animation effect on the loading bar. I'm running on a laptop with a NVS 3100m.

STEPS FOR REPRODUCTION

1. Install League of Legends from scratch.
2. Monitor GPU usage (for example with CPUID HWMonitor, although anything will do).