Excel Dynamic Ribbon API: add a possibility to add icons to the quick access toolbar

Excel has a quick access toolbar, which you can customize:

Some of the ribbon actions in our add-in are frequently used and people want to add them to that quick access toolbar, for example, "Drilldown":

However, since we use the dynamic Office.js ribbon API (requestCreateControls) , the tab is not visible in the set of tabs from which we can add icons to the quick access toolbar:

This is a downgrade from the user experience of our legacy COM-based add-in, where people could customize the quick access toolbar with our add-in commands.

Note that in both the old add-in and the new add-in the ribbon is created dynamically, and we want to keep it this way (static ribbon in the manifest is not an option for us).

In other words, in Office.js, it would be nice to mark the dynamically created tab not as "contextual" but "permanent" and let people pin the buttons from it to quick access.

Please support this functionality for dynamically created tabs as well.