[fix bug 1104944] Show the outcome of an event event if it's zero.

* Display metric details.
Merge pull request #878 from akatsoulas/1104944-show-outcome

[fix bug 1104944] Show the outcome of an event event if it's zero.
Fix error in html syntax.
Merge pull request #879 from akatsoulas/fix-template

Fix error in html syntax.
Add search options for event metrics.
Merge pull request #881 from akatsoulas/events-admin

Add search options for event metrics.