Check if there is a button event for per-entity ops before binding.
Check if there is a button event for per-entity ops before binding.

If there is a per entity button which has no directives in one
row now doesn't trigger an error anymore.

MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging,MatthewWilkes/mw4068-packaging