Changed dashboard activity overview "card-style" to list style

What does this MR do?

I always found the dashboard to be quite overwhelming with all these cards/fields. In this merge request, I present an alternative to the old card-style layout of the activity overview (see screenshots below). In my opinion this provides a cleaner, less distracting user experience.

Plese let me know whether you like this or not...

How confident are you it won't break things if deployed?

Very (I only changed scoped CSS)

How to test

Have a look at the dashboard and decide whether or not you like the new list style. No automated test needed.. (?)

Screenshots

Old:

New:

Checklist

• added a test, or explain why one is not needed/possible...
• no unrelated changes
• asked someone for a code review
• joined #foodsharing-beta channel at https://slackin.yunity.org
• added an entry to CHANGELOG.md (description, merge request link, username(s))
• Once your MR has been merged, you are responsible to update the #foodsharing-beta Slack channel about what has been changed here. They will test your work in different browsers, roles or other settings