Prevent crash when saving locally on iOS 13 safari

[ericrosenbaum]

Resolves

resolves #1783

Proposed Changes

When saving to a local file (file -> save to your computer), wait briefly before removing the download link. This prevents the crash on iOS 13, and the file downloads with a correct filename and extension.

Reason for Changes

Not 100% sure why this works, but it probably prevents a race condition in iOS Safari.

Test Coverage

No tests

Browser Coverage

Check the OS/browser combinations tested (At least 2)

Mac

• Chrome
• Firefox
• Safari

Windows

• Chrome
• Firefox
• Edge

Chromebook

• Chrome

iOS

• iOS 13 Safari
• iOS 12 Safari (via simulator)

Android Tablet

• Chrome

[chrisgarrity]

I think this is better (no crash), but I could not manage to load a file that had been downloaded. It looks like the file is in a "Downloads" Folder, but I can't find that by browsing files. The internet suggests that it's in your icloud, but I don't see it. Perhaps the safari is not logged into the same iCloud account?

[ericrosenbaum]

thanks @chrisgarrity - I was able to save and then load a project on iOS 13 on both the simulator and on my iPhone. We can look into the issue further if we hear reports of people having trouble after we get this change in.