Feature Request in single mesh (non skeletal) physic tool

hi,
if me double click on a simple mesh it open a physic tool.
there i want give the selectet elements a collision.
means the highlighted. also there i need multiselect.
i know this tool can handle this.
(working with UBX_ prefix in 3d modeller is no fun and also have side effects in render output or
if me want use the .fbx elsewhere.)