Show counters in sidebar filter in same way like we did for projects page

app/helpers/dashboard_helper.rb

app/views/dashboard/issues.html.haml

app/views/dashboard/merge_requests.html.haml

app/views/groups/issues.html.haml

app/views/groups/merge_requests.html.haml

app/views/projects/issues/_head.html.haml

app/views/projects/issues/index.html.haml

app/views/projects/merge_requests/index.html.haml

app/views/shared/_filter.html.haml

app/views/shared/_project_filter.html.haml