Actually the MultiBarBottomRightButton 1 to 6 grid issue is already there since bfa.
I have been using this code in retail since 8.0.
See here.
For this time earlier in SL alpha, I just changed what I did in retail from 'ActionButton_ShowGrid(button, ACTION_BUTTON_SHOW_GRID_REASON_CVAR)' to 'button:ShowGrid(ACTION_BUTTON_SHOW_GRID_REASON_CVAR)'.