Managed Install on Mac device does not display custom logo (4281242)

Managed installation on a Mac device, the notification does not show the Logo added in the logos overrides. On windows devices the logo does show up.

Steps taken to Repro:

1. Go to Settings | General Settings and apply the custom agent alert logo
2. Go to Distribution | Alerts | Choose Action | New
3. Set up any message and deploy to one Windows OS and one iOS (10.9.5 or 10.11.6 were already confirmed)
4. Send the alert and note that the custom logo appearance in iOS vs Windows (too small to view in iOS)

Expected Results: Expect that the custom alert logo will show properly from iOS

Actual Results: Custom alert logo is too small to view from an iOS operating system