enable links to browse milsetone issuables in dashboard and group view

app/views/shared/milestones/_sidebar.html.haml

@@ -51,7 +51,6 @@
             = link_to new_namespace_project_issue_path(project.namespace, project, issue: { milestone_id: milestone.id }), class: "pull-right", title: "New Issue" do
               New issue
         .value.hide-collapsed
-          - if project && can?(current_user, :read_issue, project)
           %span.milestone-stat
             = link_to milestones_browse_issuables_path(milestone, type: :issues) do
               Open:
@@ -60,13 +59,6 @@
             = link_to milestones_browse_issuables_path(milestone, type: :issues, state: 'closed') do
               Closed:
               = milestone.issues_visible_to_user(current_user).closed.size
-          - else
-            %span.milestone-stat
-              Open:
-              = milestone.issues_visible_to_user(current_user).opened.size
-            %span.milestone-stat
-              Closed:
-              = milestone.issues_visible_to_user(current_user).closed.size
 
     .block
       .sidebar-collapsed-icon
@@ -77,7 +69,7 @@
         Merge requests
         %span.badge= milestone.merge_requests.size
       .value.hide-collapsed
-        - if project && can?(current_user, :read_merge_request, project)
+        - if !project || can?(current_user, :read_merge_request, project)
           %span.milestone-stat
             = link_to milestones_browse_issuables_path(milestone, type: :merge_requests) do
               Open: