[1.7.3] Heroism chaining

[trungaczne]

Originally reported by Tradewind here: viewtopic.php?f=69&t=50663

Discussed fix on discord was to cap the additional duration/die_at bonus probably 100% since that's most intuitive.

[nsrr]

Thanks for re-posting the issue

I've opened a merge request to limit the bonus to 100% at 0 life or less.

Link: https://git.net-core.org/tome/t-engine4 ... quests/757