Customize error when unhandled error occurs in webapp

[lanedirt]

When an unhandled exception occurs in the client webapp, a default Blazor warning is shown at the bottom of the page asking the user to reload the page manually.

Note: this also occured when deploying .net9 version (upgraded from .net8). Probably because assemblies were outdated. It's important to have a nice displayed message instead of the default error.

Todo:

• Replace this default error message with a custom styled message that gives more information to the user and gives more information about the error (if possible)?