Rename document/image fields HTML classes

Using the `document` or `documents` classes meant styles defined for the
public list of documents conflict with these ones.

So now we're using HTML classes that match the name of the Ruby
component classes, as we usually do.

spec/shared/system/nested_documentable.rb

@@ -163,7 +163,7 @@ shared_examples "nested documentable" do |login_as_name, documentable_factory_na
       click_link "Add new document"
       click_on submit_button
 
-      within "#nested-documents .document" do
+      within "#nested-documents .document-fields" do
         expect(page).to have_content("can't be blank", count: 2)
       end
     end
@@ -175,7 +175,7 @@ shared_examples "nested documentable" do |login_as_name, documentable_factory_na
       documentable_attach_new_file(file_fixture("empty.pdf"))
       click_link "Remove document"
 
-      expect(page).not_to have_css("#nested-documents .document")
+      expect(page).not_to have_css("#nested-documents .document-fields")
     end
 
     scenario "Should show successful notice when
@@ -248,7 +248,7 @@ shared_examples "nested documentable" do |login_as_name, documentable_factory_na
         do_login_for user_to_login, management: management
         visit send(path, arguments)
 
-        expect(page).to have_css ".document", count: 1
+        expect(page).to have_css ".document-fields", count: 1
       end
 
       scenario "Should not show add document button when
@@ -264,7 +264,7 @@ shared_examples "nested documentable" do |login_as_name, documentable_factory_na
         create_list(:document, documentable.class.max_documents_allowed, documentable: documentable)
         do_login_for user_to_login, management: management
         visit send(path, arguments)
-        last_document = all("#nested-documents .document").last
+        last_document = all("#nested-documents .document-fields").last
         within last_document do
           click_on "Remove document"
         end
@@ -278,7 +278,7 @@ shared_examples "nested documentable" do |login_as_name, documentable_factory_na
         visit send(path, arguments)
         click_on "Remove document"
 
-        expect(page).not_to have_css ".document"
+        expect(page).not_to have_css ".document-fields"
       end
 
       scenario "Same attachment URL after editing the title" do

spec/shared/system/nested_imageable.rb

@@ -57,7 +57,7 @@ shared_examples "nested imageable" do |imageable_factory_name, path, imageable_p
       visit send(path, arguments)
 
       click_link "Add image"
-      input_title = find(".image input[name$='[title]']")
+      input_title = find(".image-fields input[name$='[title]']")
       fill_in input_title[:id], with: "Title"
       attach_file "Choose image", file_fixture("clippy.jpg")
 
@@ -119,7 +119,7 @@ shared_examples "nested imageable" do |imageable_factory_name, path, imageable_p
       click_link "Add image"
       click_on submit_button
 
-      within "#nested-image .image" do
+      within "#nested-image .image-fields" do
         expect(page).to have_content("can't be blank", count: 2)
       end
     end
@@ -143,11 +143,11 @@ shared_examples "nested imageable" do |imageable_factory_name, path, imageable_p
 
       imageable_attach_new_file(file_fixture("clippy.jpg"))
 
-      within "#nested-image .image" do
+      within "#nested-image .image-fields" do
         click_link "Remove image"
       end
 
-      expect(page).not_to have_selector("#nested-image .image")
+      expect(page).not_to have_selector("#nested-image .image-fields")
     end
 
     scenario "Should show successful notice when resource filled correctly without any nested images",
@@ -216,7 +216,7 @@ shared_examples "nested imageable" do |imageable_factory_name, path, imageable_p
 
         visit send(path, arguments)
 
-        expect(page).to have_css ".image", count: 1
+        expect(page).to have_css ".image-fields", count: 1
         expect(page).not_to have_css "a#new_image_link"
       end
 
@@ -227,7 +227,7 @@ shared_examples "nested imageable" do |imageable_factory_name, path, imageable_p
         visit send(path, arguments)
         click_link "Remove image"
 
-        expect(page).not_to have_css ".image"
+        expect(page).not_to have_css ".image-fields"
         expect(page).to have_link id: "new_image_link"
       end
 
@@ -239,7 +239,7 @@ shared_examples "nested imageable" do |imageable_factory_name, path, imageable_p
         click_link "Remove image"
         click_link "Add image"
 
-        expect(page).to have_css ".image", count: 1, visible: :all
+        expect(page).to have_css ".image-fields", count: 1, visible: :all
       end
     end
   end