There is no way to enable or disable a button. Buttons are always enabled and active - unless you hide them. There should be a property "Enabled" in the "Button" frontend-class defaulting to "true" that can be switched to "false".
The option to display an action button as a menu separator has only effect for sub-actions.
I find it hard to make it clear that certain actionbuttons can be considered as grouped. A horizontal menu separator could make this more clear.
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I find myself quite often, in a view's action bar, having to hide action buttons based on either an ACL role or a value in a profile document. If I have 10 actions, and each one is hidden dependent on a profile document setting, then that is 10 lookups to ...
For agents, you can configure document selection and/or specify the target for the agent (all documents, selected documents, etc). However, for action buttons in the view action bar, most of the simple actions and formula code act only on the highlighted (caret) document in the view, regardless of whether you ...