Fix export issues end-to-end test

Now that exporting issues list as a cvs has moved to core we have
to move some elements and methods from a ee page object to its ce
counterpart.

qa/qa/ee/page/project/issue/index.rb

@@ -16,28 +16,7 @@ module QA
                 view 'ee/app/views/projects/issues/_issue_weight.html.haml' do
                   element :issuable_weight
                 end
-
-                view 'app/views/projects/issues/export_csv/_button.html.haml' do
-                  element :export_as_csv_button
-                end
-
-                view 'app/views/projects/issues/export_csv/_modal.html.haml' do
-                  element :export_issues_button
-                  element :export_issues_modal
-                end
-              end
               end
-
-            def click_export_as_csv_button
-              click_element(:export_as_csv_button)
-            end
-
-            def click_export_issues_button
-              click_element(:export_issues_button)
-            end
-
-            def export_issues_modal
-              find_element(:export_issues_modal)
             end
 
             def issuable_weight

qa/qa/page/project/issue/index.rb

@@ -9,6 +9,15 @@ module QA
             element :assignee_link
           end
 
+          view 'app/views/projects/issues/export_csv/_button.html.haml' do
+            element :export_as_csv_button
+          end
+
+          view 'app/views/projects/issues/export_csv/_modal.html.haml' do
+            element :export_issues_button
+            element :export_issues_modal
+          end
+
           view 'app/views/projects/issues/_issue.html.haml' do
             element :issue
             element :issue_link, 'link_to issue.title' # rubocop:disable QA/ElementWithPattern
@@ -34,6 +43,18 @@ module QA
             click_element :closed_issues_link
           end
 
+          def click_export_as_csv_button
+            click_element(:export_as_csv_button)
+          end
+
+          def click_export_issues_button
+            click_element(:export_issues_button)
+          end
+
+          def export_issues_modal
+            find_element(:export_issues_modal)
+          end
+
           def has_assignee_link_count?(count)
             all_elements(:assignee_link, count: count)
           end