D20400: Karbon: Enable multi page capability

[René J.V. Bertin]

>  (Sorry for the inconvinience, I've never been very friendly with arc/phab)

Understandable ;)

Did you go the "official" route, committing your changes to a local branch and then using `arc diff` to create a review request? You probably should have used ` --update revision_id` .
I always use uncommitted changes myself, either going through the Purpose/KDevelop plugin to upload a diff to phab, or using the web interface. That approach has its own quirks and inconveniences but ones I prefer.