When you put a button above e.g. a RichText field, to perform a simple action as 'EditInsertFileAttachment', the user would like it to insert the attachment where the cursor is at that moment.
Currenty when clicking a button, this button get's the focus, and you don't know where the cursor/focus was before.
An action in the actionbar does not change the focus, but can only be positioned at the top.
So my idea to have a 'No Focus on Click' button-property would allow us developers to be more flexible in building a great UI.