Allow for more detailed email engagement filters

Problem: The following filters have limited operator filters and cannot drill down to Date and TIME of activity:

- Was Sent Email

- Opened Email 

- Clicked Link in Email

Impact: When Marketo has an outage (Recent outage #202305030020) that creates an issue isolated to a specific time frame (Example: 7 AM to 10 AM PT on May 3rd), and Marketo users cannot react to that issue effectively. 

In this recent outage, anyone who clicked a link in an email within that timeframe was faced with a 404 issue. This resulted in a poor customer experience (cannot access desired content) and lack of trust in our brand (looks like we made an avoidable mistake).

Suggestion: Expand on filter operators and filter options so users can drill down into more specific timeframes. Here are some examples: