No confirmation prompt for navigation (and data-loss)

[itkfm]

Unlike the Flutter frontend, the React one does not prompt for confirmation when leaving forms either through the built-in “back” buttons or the browser’s navigation.
As this differs from the previous experience with the Flutter frontend, this tends to cause coworkers to trip up and accidentally lose unsaved data.

[turbo124]

@itkfm we do have a PR we are testing for this currently, it is almost ready.