ImGuiListClipper: Fix to behave within column (#661, #662, #716)
ImGuiListClipper: Fix to behave within column (#661, #662, #716)

ocornut/imgui,Pagghiu/imgui,burningreggae/imgui,dougbinks/imgui,cmaughan/imgui,elect86/imgui,wasikuss/imgui,wflohry/imgui-addons,thennequin/imgui,elect86/imgui,thevaber/imgui,Pagghiu/imgui,nProtect/imgui,usagi/imguixx,ocornut/imgui,cmaughan/imgui,dougbinks/imgui,bkaradzic/imgui,ggtucker/imgui,mikesart/imgui,cmaughan/imgui,Psybrus/imgui,ocornut/imgui,Flix01/imgui,bkaradzic/imgui,tom-seddon/imgui,Flix01/imgui,wflohry/imgui-addons,seanmiddleditch/imgui,ggtucker/imgui,wasikuss/imgui,Psybrus/imgui,burningreggae/imgui,usagi/imguixx,bkaradzic/imgui,ggtucker/imgui,nProtect/imgui,thevaber/imgui,nProtect/imgui,seanmiddleditch/imgui,cmaughan/imgui,Flix01/imgui,aimotive/imgui-glfw,thennequin/imgui,aimotive/imgui-glfw,mikesart/imgui,tom-seddon/imgui