Fix URL targets for uploads, markdown preview and autocomplete in MR textareas

CHANGELOG

@@ -55,6 +55,7 @@ v 8.0.0 (unreleased)
   - Webhook for issue now contains repository field (Jungkook Park)
   - Add ability to add custom text to the help page (Jeroen van Baarsen)
   - Add pg_schema to backup config
+  - Fix references to target project issues in Merge Requests markdown preview and textareas (Francesco Levorato)
 v 7.14.3
   - No changes

app/views/layouts/_init_auto_complete.html.haml

+- project = @target_project || @project
 :javascript
-  GitLab.GfmAutoComplete.dataSource = "#{autocomplete_sources_namespace_project_path(@project.namespace, @project, type: @noteable.class, type_id: params[:id])}"
+  GitLab.GfmAutoComplete.dataSource = "#{autocomplete_sources_namespace_project_path(project.namespace, project, type: @noteable.class, type_id: params[:id])}"
   GitLab.GfmAutoComplete.setup();

app/views/layouts/project.html.haml

@@ -3,10 +3,11 @@
 - sidebar       "project"               unless sidebar
 - content_for :scripts_body_top do
+  - project = @target_project || @project
   - if current_user
     :javascript
-      window.project_uploads_path = "#{namespace_project_uploads_path @project.namespace, @project}";
-      window.markdown_preview_path = "#{markdown_preview_namespace_project_path(@project.namespace, @project)}";
+      window.project_uploads_path = "#{namespace_project_uploads_path project.namespace,project}";
+      window.markdown_preview_path = "#{markdown_preview_namespace_project_path(project.namespace, project)}";
 - content_for :scripts_body do
   = render "layouts/init_auto_complete" if current_user