Users may disable the "show historic alarms" button to prevent users from selecting it.
To do so, add the following key/value pair to wasp.cfg in the <ump_common> section:
allow_showing_historical_alarms = false
Restart wasp and now users will not be able to view historical alarms.
Note: This option is only available in UMP USM 8.31HF6 or higher (e.g. 8.4.) The latest hotfix for USM can be downloaded here.