ios: hidden individual upload-measurement toast

[bassosimone]

Describe the bug

The individual "upload measurement" toast is partially hidden.

To Reproduce

Disable automatic upload of measurements. Run IM. Check individual measurement screen.

Expected behavior

It should be visible.

Screenshots

System information (please complete the following information):

• Device: iPhone SE (third generation) 2022
  • OS: iOS 16.5.1(c)
  • OONI Probe version: https://github.com/ooni/probe-ios/commit/8e59ca2238be6a4923bccf37a775adf1a024ac16

Additional context

N/A