List of exceptions that should be either removed or handled

[herzbube]

The following exceptions should be either removed or handled, i.e. they should not trigger a crash:

• All exceptions in GenerateDiagnosticsInformationFileCommand. These error situations are not fatal to the overall application, they just make generation of a bug report impossible.
• PlayViewMetrics, updateWithRect:boardSize: should not raise an exception, instead it should log the problem and find a way to gracefully deal with the situation.