Default Close dialogue button

[nomandera]

It is perhaps a bit unintuitive that the location typically occupied by the close X icon is often occupied by other functions

For example

Consideration should be given to a more traditional layout allowing for users to back out all the way to the homescreen by pressing a similarly located close dialogue as many times as needed.

[KodeStar]

I could put a cancel button next to it

[nomandera]

Sounds good to me. If the top right icon is always there and is always cancel I think it would be instantly intuitive to all users.