Streamlining icons in the UI

Replaced the 'issue-external' icon with the 'external' link icon.

app/views/layouts/nav/sidebar/_project.html.haml

@@ -143,7 +143,7 @@
           - issue_tracker = @project.external_issue_tracker
           = link_to issue_tracker.issue_tracker_path, class: 'shortcuts-external_tracker' do
             .nav-icon-container
-              = sprite_icon('issue-external')
+              = sprite_icon('external-link')
             %span.nav-item-name
               = issue_tracker.title
           %ul.sidebar-sub-level-items.is-fly-out-only
@@ -319,7 +319,7 @@
         = nav_link do
           = link_to external_wiki_url, class: 'shortcuts-external_wiki' do
             .nav-icon-container
-              = sprite_icon('issue-external')
+              = sprite_icon('external-link')
             %span.nav-item-name
               = _('External Wiki')
           %ul.sidebar-sub-level-items.is-fly-out-only

changelogs/unreleased/208827-replace-issue-external-icon-with-external-link.yml

+---
+title: Replace issue-external icon with external-link
+merge_request: 208827
+author:
+type: other