Description of problem:
  Visibility expression for custom buttons on Generic Object does not evaluate correctly


How reproducible: 100%


Steps to Reproduce:

1. Create Generic Object Definition  with name "ObjectDefinition":
Automation-> Automate->Generic Object->Configuration->Add New Generic Object Class

2. Create Custom Action for Generic Object with visibility expression:
Automation->Automate->Customization->Generic Object ->[Unassigned Buttons]->Add New 
Button. 
Visibility Expression: Generic Object : Name = "MyObject"

3. In Rails console create Generic Object and get list of buttons for that object: 
> obj_def = GenericObjectDefinition.where(:name => "ObjectDefinition").last
> obj = GenericObject.create(:generic_object_definition => obj_def, :name => "MyObject")
> actions = obj.custom_actions[:buttons]

Actual results:
 actions is empty array

Expected results:
 actions should have custom button created in step 2