This is required to avoid silencing (potentially fatal) exceptions from timer procedures.
-- v4: win32u: Ignore unhandled info index in NtUserSetObjectInformation. win32u/tests: Add tests for NtUserSetObjectInformation. user32: Implement UOI_TIMERPROC_EXCEPTION_SUPPRESSION. user32/tests: Add tests for UOI_TIMERPROC_EXCEPTION_SUPPRESSION. include: Add definition for UOI_TIMERPROC_EXCEPTION_SUPPRESSION user32/tests: Make test_unicode_wm_char robust against superfluous messages.