Refactor: Internals: Moved Navigation functions in imgui.cpp in their own section (extracted some code out of NavUpdate()). (part 3) (#2036, #787)
Refactor: Internals: Moved Navigation functions in imgui.cpp in their own section (extracted some code out of NavUpdate()). (part 3) (#2036, #787)

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