Refactor: Internals: Moved Navigation functions in imgui.cpp in their own section. (part 2) (#2036, #787)
Refactor: Internals: Moved Navigation functions in imgui.cpp in their own section. (part 2) (#2036, #787)

ggtucker/imgui,ocornut/imgui,ocornut/imgui,burningreggae/imgui,bkaradzic/imgui,ggtucker/imgui,bkaradzic/imgui,nProtect/imgui,cmaughan/imgui,aimotive/imgui-glfw,bkaradzic/imgui,ocornut/imgui,cmaughan/imgui,cmaughan/imgui,cmaughan/imgui,aimotive/imgui-glfw,Flix01/imgui,dougbinks/imgui,ggtucker/imgui,nProtect/imgui,burningreggae/imgui,Flix01/imgui,Flix01/imgui,nProtect/imgui,dougbinks/imgui