Merge branch 'patch-53' into 'master'

Externalize some strings in issue page and new issue page

See merge request gitlab-org/gitlab-ce!27529

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

-- add_to_breadcrumbs "Issues", project_issues_path(@project)
-- breadcrumb_title "New"
-- page_title "New Issue"
+- add_to_breadcrumbs _("Issues"), project_issues_path(@project)
+- breadcrumb_title _("New")
+- page_title _("New Issue")
 
 %h3.page-title
-  New Issue
+  _("New Issue")
 %hr
 
 = render "form"

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

 - @content_class = "limit-container-width" unless fluid_layout
-- add_to_breadcrumbs "Issues", project_issues_path(@project)
+- add_to_breadcrumbs _("Issues"), project_issues_path(@project)
 - breadcrumb_title @issue.to_reference
-- page_title           "#{@issue.title} (#{@issue.to_reference})", "Issues"
+- page_title           "#{@issue.title} (#{@issue.to_reference})", _("Issues")
 - page_description     @issue.description
 - page_card_attributes @issue.card_attributes