Rather than every 30 seconds. This way we'll save logs for sessions
lasting less than 30 seconds which we previously didn't. Also save
on window unload just in case that doesn't catch everything.
Plus remove some more unused params.
* Remove duplicate copyright header
* Remove ts-ignores by just using the objects directly rather than via
event.target
* Use error.message rather than errorCode which TS doesn't know about
and may or may not exist.
* Remove some unused things like the skip rageshake function and
the option to init rageshakes without storage.
* Turn single function with a boolean param to make it take two entirely
separate code paths into two functions.
This is an Element project (in the vector-im repo) so the Copyright
should be for New Vector: it was incorrectly attributed to the
foundation for some files (and some files were missing headers).
