Automatic icon on App download page

Description of the feature request

In lots of cases, app icons is selected depending on some factors (Targets, Schemes, build configurations…), but the app icon on the download page for bitrise, is always the same you uploaded on the app settings.

Use case / for what or how I would use it

So, the feature would be to add a checkbox on ā€œupload to bitriseā€ step on the workflow to allow to extract the icon from the bundle uploaded.