Update environments nav controls icons

app/views/projects/environments/_external_url.html.haml

 - if environment.external_url && can?(current_user, :read_environment, environment)
   = link_to environment.external_url, target: '_blank', rel: 'noopener noreferrer', class: 'btn external-url' do
-    = icon('external-link')
+    = sprite_icon('external-link')
     View deployment

app/views/projects/environments/_metrics_button.html.haml

@@ -3,5 +3,5 @@
 - return unless can?(current_user, :read_environment, environment)
 
 = link_to environment_metrics_path(environment), title: 'See metrics', class: 'btn metrics-button' do
-  = icon('area-chart')
+  = sprite_icon('chart')
   Monitoring

app/views/projects/environments/_terminal_button.html.haml

 - if environment.has_terminals? && can?(current_user, :admin_environment, @project)
   = link_to terminal_project_environment_path(@project, environment), class: 'btn terminal-button' do
-    = icon('terminal')
+    = sprite_icon('terminal')

app/views/projects/environments/terminal.html.haml

@@ -16,7 +16,7 @@
         .nav-controls
           - if @environment.external_url.present?
             = link_to @environment.external_url, class: 'btn btn-default', target: '_blank', rel: 'noopener noreferrer nofollow' do
-              = icon('external-link')
+              = sprite_icon('external-link')
           = render 'projects/deployments/actions', deployment: @environment.last_deployment
 
 .terminal-container{ class: container_class }

changelogs/unreleased/update-environments-nav-controls.yml

+---
+title: Update environments nav controls icons
+merge_request: 20199
+author: George Tsiolis
+type: changed