imconfig: Added comment about redefining ImDrawIdx
imconfig: Added comment about redefining ImDrawIdx

dougbinks/imgui,ggtucker/imgui,thevaber/imgui,ggtucker/imgui,cmaughan/imgui,bkaradzic/imgui,thevaber/imgui,elect86/imgui,ggtucker/imgui,mikesart/imgui,ocornut/imgui,tom-seddon/imgui,Flix01/imgui,aimotive/imgui-glfw,burningreggae/imgui,ocornut/imgui,cmaughan/imgui,aimotive/imgui-glfw,tom-seddon/imgui,Flix01/imgui,wflohry/imgui-addons,dougbinks/imgui,cmaughan/imgui,burningreggae/imgui,nProtect/imgui,Pagghiu/imgui,wflohry/imgui-addons,Flix01/imgui,nProtect/imgui,elect86/imgui,nProtect/imgui,mikesart/imgui,bkaradzic/imgui,ocornut/imgui,Pagghiu/imgui,bkaradzic/imgui,cmaughan/imgui