Improve memory reserve policy for Clipboard/ImGuiBuffer
Improve memory reserve policy for Clipboard/ImGuiBuffer

sakishum/imgui,bkaradzic/imgui,rxantos/imgui,bkaradzic/imgui,neshume/imgui,shaggytwodope/imgui,rxantos/imgui,rmoorman/imgui,tom-seddon/imgui,emoon/imgui,ggtucker/imgui,Psybrus/imgui,wasikuss/imgui,bagobor/imgui,xythobuz/imgui,thennequin/imgui,Pagghiu/imgui,gamedeff/imgui,benoitjacquier/imgui,ghassanpl/imgui,twigletguy/imgui,DXsmiley/FlexGUI,xythobuz/imgui,andresv/imgui,wangshijin/imgui,gyakoo/imgui,gyakoo/imgui,shaggytwodope/imgui,benoitjacquier/imgui,aimotive/imgui-glfw,wflohry/imgui-addons,nmlgc/imgui,Flix01/imgui,tpoechtrager/imgui,Extrawurst/imgui,thevaber/imgui,ghassanpl/imgui,kylawl/imgui,burningreggae/imgui,wasikuss/imgui,thennequin/imgui,seanmiddleditch/imgui,bagobor/imgui,bkaradzic/imgui,thevaber/imgui,cmaughan/imgui,Psybrus/imgui,tom-seddon/imgui,ggtucker/imgui,usagi/imguixx,wflohry/imgui-addons,tpoechtrager/imgui,ocornut/imgui,redblobgames/imgui,redblobgames/imgui,GHF/imgui,nProtect/imgui,seanmiddleditch/imgui,luiseduardohdbackup/imgui,kylawl/imgui,mikesart/imgui,Pagghiu/imgui,zho7611/imgui,nProtect/imgui,dougbinks/imgui,wangshijin/imgui,nProtect/imgui,dougbinks/imgui,ocornut/imgui,nmlgc/imgui,luiseduardohdbackup/imgui,sakishum/imgui,andresv/imgui,ggtucker/imgui,twigletguy/imgui,neshume/imgui,burningreggae/imgui,usagi/imguixx,ocornut/imgui,zho7611/imgui,GHF/imgui,elect86/imgui,xunmengfeng/imgui,xunmengfeng/imgui,gamedeff/imgui,cmaughan/imgui,DXsmiley/FlexGUI,emoon/imgui,mikesart/imgui,cmaughan/imgui,elect86/imgui,Extrawurst/imgui,rmoorman/imgui,Flix01/imgui,aimotive/imgui-glfw,cmaughan/imgui,Flix01/imgui