Show iid as default id for issues, mr

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

@@ -4,7 +4,7 @@
       = check_box_tag dom_id(issue,"selected"), nil, false, 'data-id' => issue.id, class: "selected_issue", disabled: !can?(current_user, :modify_issue, issue)
   .issue-title
-    %span.light= "##{issue.id}"
+    %span.light= "##{issue.iid}"
     = link_to_gfm truncate(issue.title, length: 100), project_issue_path(issue.project, issue), class: "row_title"
   .issue-info

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

 %h3.page-title
-  Issue ##{@issue.id}
+  Issue ##{@issue.iid}
   %small
     created at

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

 %li{ class: mr_css_classes(merge_request) }
   .merge-request-title
-    %span.light= "##{merge_request.id}"
+    %span.light= "##{merge_request.iid}"
     = link_to_gfm truncate(merge_request.title, length: 80), project_merge_request_path(merge_request.target_project, merge_request), class: "row_title"
     - if merge_request.merged?
       %small.pull-right

app/views/projects/merge_requests/show/_mr_title.html.haml

 %h3.page-title
-  = "Merge Request ##{@merge_request.id}:"
+  = "Merge Request ##{@merge_request.iid}:"
    
   -if @merge_request.for_fork?
     %span.label-branch