Formats a message string from a status code and status arguments.
| aStatus | - The status code. This is mapped into a string ID and and used in the string lookup process (see nsIErrorService). |
| aStatusArg | - The status message argument(s). Multiple arguments can be separated by newline ('\n') characters. |
| the formatted message |
flushes the string bundle cache - useful when the locale changes or
when we need to get some extra memory back
at some point, we might want to make this flush all the bundles,
because any bundles that are floating around when the locale changes
will suddenly contain bad data