Project page changes - Activity log includes email copy

We've been thinking hard about how to make the Project page more useful, and have made several changes…

…We've given Activity logs their own tab

…Because Activity logs now include copy for all sent emails ✉️ which relate to the Project 🤩🤩🤩

…We thought that Tasks deserved their own tab too

…And we updated the Schedule tab, so that you can see the calendar in user list mode. This means you'll be able to see which members of your team are available as you're booking in Project Events 📅