Set page title based on content in dashboard area

app/views/dashboard/_groups_head.html.haml

app/views/dashboard/_projects_head.html.haml

app/views/dashboard/activity.html.haml

app/views/dashboard/groups/index.html.haml

app/views/dashboard/issues.html.haml

app/views/dashboard/merge_requests.html.haml

app/views/dashboard/milestones/index.html.haml

app/views/dashboard/projects/starred.html.haml

app/views/dashboard/show.html.haml

app/views/explore/groups/index.html.haml

app/views/layouts/dashboard.html.haml

app/views/layouts/explore.html.haml

app/views/layouts/snippets.html.haml

app/views/snippets/current_user_index.html.haml

app/views/snippets/index.html.haml