[Feature request] Activity page: compact view, display number of rows, allow increasing of number of rows per page

[MaximilianKohler]

Thank you for this awesome app! Some first impressions:

All the whitespace here is really unnecessary I think: https://sesdashboard.readthedocs.io/en/latest/_images/sesdashboard-activity.png

There is also no indication of how many rows are shown on the page. It looks to be around 15, which is very limited. I'd like to increase it to at least 50.

The date text could be shrunk so that the end date doesn't get cut off:

[MaximilianKohler]

Also, when you type in an Email or Subject into the Search bar and hit ENTER nothing happens. You have to click "Search" on the right.

The text is also case-sensitive, which is not good.