Update dashboard milestones breadcrumb link

- Add milestone path to `/dashboard/milestones` breadcrumb link (which was causing 404 error)
- Add milestone name to `/dashboard/milestones` breadcrumb
- Add whitespace after the milestone name

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

-- page_title milestone.title, "Milestones"
+- page_title @milestone.title
+- @breadcrumb_link = dashboard_milestone_path(milestone.safe_title, title: milestone.title)
 
 - group = local_assigns[:group]
 
@@ -17,7 +18,7 @@
     Milestone #{milestone.title}
   - if milestone.due_date || milestone.start_date
     %span.creator
-      ·
+       ·
       = milestone_date_range(milestone)
   - if group
     .pull-right

changelogs/unreleased/add-milestone-path-to-dashboard-milestones-breadcrumb-link.yml

+---
+title: Update dashboard milestones breadcrumb link
+merge_request: 17933
+author: George Tsiolis
+type: fixed