Ability to change Extension context removed from GUI when certain modules are installed

I'm labeling this as a bug. When the Class of Service, Extensions Routing or Custom Context modules are installed the "Context" text field is removed from the GUI under Extensions -> Advanced making it no longer possible to manage the context that extension uses.

It would be nice to see this text field still available after any of these modules are installed. Even if it's grayed out and requires a checkbox or some user interaction to use it.