Can now specify collapsability of ClassVectorParameterUI using a piece of parameter userData.
Can now specify collapsability of ClassVectorParameterUI using a piece of parameter userData.

ruschelp/cortex-vfx,ruschelp/cortex-vfx,code-google-com/cortex-vfx,ruschelp/cortex-vfx,code-google-com/cortex-vfx,code-google-com/cortex-vfx,code-google-com/cortex-vfx