iOS does not allow HTTPS media

[ewpatton]

Describe the bug

From the forum: Android allows using HTTPS URLs for images, etc. but iOS does not.

Affects

• Designer
• Blocks editor
• Projects Explorer
• Companion
• Compiled apps
• Buildserver
• Debugging
• Other... (please describe)

Expected behavior

The two platforms should behave the same.

Steps to reproduce

Create an app with a button and set the background image of the button to an HTTPS URL accessible on the web. This will work on Android but not on iOS.