Improve copy on Slack app delete project modal

Changelog: changed
EE: true

ee/app/views/projects/services/gitlab_slack_application/_slack_integration_form.html.haml

@@ -23,7 +23,7 @@
         .controls
           - project = integration.project
           = link_to _('Edit'), edit_project_settings_slack_path(project), class: 'btn gl-button btn-default'
-          = link_to sprite_icon('remove', css_class: 'gl-icon'), project_settings_slack_path(project), method: :delete, class: 'btn gl-button btn-danger btn-danger-secondary', data: { confirm: 'Are you sure?' }
+          = link_to sprite_icon('remove', css_class: 'gl-icon'), project_settings_slack_path(project), method: :delete, class: 'btn gl-button btn-danger btn-danger-secondary', aria: { label: s_('SlackIntegration|Remove project') }, data: { confirm_btn_variant: "danger", confirm: s_('SlackIntegration|Are you sure you want to remove this project from the Slack application?') }
 - else
   %p= s_('SlackIntegration|To set up this integration press "Add to Slack"')
   = render "projects/services/#{integration.to_param}/slack_button", project: @project

locale/gitlab.pot

@@ -33394,6 +33394,9 @@ msgstr ""
 msgid "Slack logo"
 msgstr ""
 
+msgid "SlackIntegration|Are you sure you want to remove this project from the Slack application?"
+msgstr ""
+
 msgid "SlackIntegration|GitLab for Slack"
 msgstr ""
 
@@ -33403,6 +33406,9 @@ msgstr ""
 msgid "SlackIntegration|Project alias"
 msgstr ""
 
+msgid "SlackIntegration|Remove project"
+msgstr ""
+
 msgid "SlackIntegration|Select a GitLab project to link with your Slack workspace."
 msgstr ""