Refactor uploads_path to form data in wikis/edit

app/assets/javascripts/dropzone_input.js

@@ -18,7 +18,7 @@ export default function dropzoneInput(form) {
   const $uploadingErrorContainer = form.find('.uploading-error-container');
   const $uploadingErrorMessage = form.find('.uploading-error-message');
   const $uploadingProgressContainer = form.find('.uploading-progress-container');
-  const uploadsPath = window.uploads_path || null;
+  const uploadsPath = form.data('uploads-path') || window.uploads_path || null;
   const maxFileSize = gon.max_file_size || 10;
   const formTextarea = form.find('.js-gfm-input');
   let handlePaste;

app/views/projects/wikis/_form.html.haml

@@ -7,7 +7,7 @@
 
 = form_for [@project.namespace.becomes(Namespace), @project, @page], method: @page.persisted? ? :put : :post,
            html: { class: 'wiki-form common-note-form prepend-top-default js-quick-submit' },
-           data: { markdown_version: markdown_version } do |f|
+           data: { markdown_version: markdown_version, uploads_path: uploads_path } do |f|
   = form_errors(@page)
 
   - if @page.persisted?

app/views/projects/wikis/edit.html.haml

@@ -36,13 +36,8 @@
           type: 'button' }
           = _('Delete')
 
-= render 'form'
+= render 'form', uploads_path: wiki_attachment_upload_url
 
 = render 'sidebar'
 
 #delete-wiki-modal.modal.fade
-
-- content_for :scripts_body do
-  -# haml-lint:disable InlineJavaScript
-  :javascript
-    window.uploads_path = "#{wiki_attachment_upload_url}";