Redesign ios fixes 2

[jeroenleenarts]

• Simpler error messages (Fixes #345, #358)
• macOS: Set app name as main window name (Fixes #351)
• iOS: Attempts to fix crash when selecting a profile in iOS 14.2

[github-actions[bot]]

Make sure to keep CHANGES.md up to date!

[roop]

@jeroenleenarts Thanks for getting this merged.