try(:abstract_model) did never work. try is not required here, lazymodel will safely return nil if abstract_model didnt exist ...
AFAIK t.message is never equal to either 'delete' or 'new', so remove this condition and always show t.messsage.
user i18n model name as label if object has been destroyed mean while.
fix typo
fix to enable listing of history entries of model names that do not exist anymore.
Merge pull request #1843 from ideadapt/dashboard-history-view-corrections

Upgrade dashboard history view
Allowed Rails 4.1 beta 1