An Iceberg Authentication Error gives a message box with a single line that doesn't wrap (so can't read it all)

[macta]

Bug description When you get an Iceberg authentication error, the resulting alert box shows a message on a single line that extends beyond the size you can stretch the message box - it should wrap the text.

I think its the context application messages like #newAlert that need looking at as I suspect all messages are impacted.

To Reproduce Steps to reproduce the behavior:

1. see bug: https://github.com/pharo-project/pharo/issues/16391

Expected behavior Should get a mssage box that wraps text - I believe this applies to all the variants of the system message UI

Screenshots If applicable, add screenshots to help explain your problem.

Version information:

• OS: [e.g. iOS] MacOS
• Version: [e.g. 1.6.1] na/
• Pharo Version [e.g 9] Pharo-12 dev image from 12-apr

Expected development cost

Should be a small fix - either use a wrapping text control or format the message string to a fixed size (not as good as screen sizes vary - but might be able to determine a good size based on the environment.

Additional context Add any other context about the problem here.

[macta]

A similar issue happens with merge warning - the info prompt isn't calculating a good size (can definitely do better)