This addon fixes an annoying issue in 1.8 version that relates to F3 combinations.
For example, firing F3+A to realod chunks also moves you left (because of A) and keeps debug screen opened after that.
Without addon:
With addon:
It's even more annoying when you need to reaload textures via F3+T, because both debug screen and chat remain opened after a command.
The addon fixes mentioned issues while a stanalone press of F3 works as usual — it opens a debug screen.
Head over to releases and download the latest F3CommandsFix.jar