Codebase (MainActivity fragment)

Undertaken some work to LatestActivity fragment. Fixed an issue with
padding with user targets notifications and latest activity.
Codebase (LatestActivity fragment)

Minor fix to last commit. Didn't include a validation to check whether
both targets were met; and if so, to reduce number of visible items by
1.
Codebase (MainActivity)

Reformatted the presentation of latest sessions. Now shares same
presentation as 'THIS YEAR' in Sessions.