[Scheduler App] Cancel pop-out for meetings is missing an image

This is a simple fix, there's an image placeholder in the pop-out, we should add an image or get rid of them.

Also, maybe we can create a common pop-out component, to use across our apps.

Start by locating the Scheduler App meeting pop-out and inspect the placeholder shown when cancelling a meeting. The issue names no file or test, so first identify the relevant UI entry point; done means the pop-out either displays an appropriate image or no longer shows the placeholder, with the result verified in the app.

Written by the indexing model from the issue text.