Make event history view more fancier

refs #6637
Add limit-control and fix indentation of the eventhistory view

refs #6637
Fix object history dates make output look similar to the event history

refs #6637
Let downtime view look more list-like and fix downtime end calculation

refs #6637
Show only acknowledgement and user comments by default
Let comment view look more standardized and add limit control

refs #6637
Merge branch 'master' into bugfix/styled-history-views-6637
Merge branch 'bugfix/styled-history-views-6637'

fixes #6637