ImGui: Added color edit helper.
ImGui: Added color edit helper.

fluffyfreak/bgfx,bkaradzic/bgfx,attilaz/bgfx,jpcy/bgfx,LWJGL-CI/bgfx,jdryg/bgfx,mmicko/bgfx,Synxis/bgfx,septag/bgfx,jdryg/bgfx,jdryg/bgfx,fluffyfreak/bgfx,LWJGL-CI/bgfx,jpcy/bgfx,bkaradzic/bgfx,Synxis/bgfx,MikePopoloski/bgfx,Synxis/bgfx,jdryg/bgfx,mmicko/bgfx,septag/bgfx,septag/bgfx,attilaz/bgfx,emoon/bgfx,emoon/bgfx,bkaradzic/bgfx,mendsley/bgfx,attilaz/bgfx,LWJGL-CI/bgfx,fluffyfreak/bgfx,mmicko/bgfx,jpcy/bgfx,bkaradzic/bgfx,emoon/bgfx,mendsley/bgfx,MikePopoloski/bgfx,mendsley/bgfx,fluffyfreak/bgfx,LWJGL-CI/bgfx,MikePopoloski/bgfx,jpcy/bgfx