#JC-1869 - Combobox for the "Start Discussion" and "Create Code Review" buttons became a split button dropdown instead of the combobox.
Problem with permissions is still there - we need to handle the situation when user will not have rights to
create a ordinary topic or review. But we do not have any special tags to check if user does not have the permission or
analyze how many different topic types user can create.
My idea is to load the options for the new topic from the server - in this case we can analyze the count of the topic types and
create appropriate UI.