Please bring back "Disable Lightning" option

[cluthz]

dolphin-emu tob$ git status
# On branch master
# Changes to be committed:
# (use "git reset HEAD <file>..." to unstage)
#
# modified: Source/Core/VideoCommon/Src/EmuWindow.cpp
# modified: Source/Core/VideoCommon/Src/RenderBase.cpp
# modified: Source/Core/VideoCommon/Src/VertexManagerBase.cpp
# modified: Source/Plugins/Plugin_VideoOGL/Src/GLUtil.cpp
#
# Unmerged paths:
# (use "git reset HEAD <file>..." to unstage)
# (use "git add/rm <file>..." as appropriate to mark resolution)
#
# both modified: Source/Core/DolphinWX/Src/VideoConfigDiag.cpp
# both modified: Source/Core/VideoCommon/Src/VideoConfig.cpp
# both modified: Source/Core/VideoCommon/Src/VideoConfig.h
#
# Untracked files:
# (use "git add <file>..." to include in what will be committed)
#