Fix version select style on wp form inline create

Signed-off-by: Alex Coles <alex@alexbcoles.com>

app/controllers/versions_controller.rb

@@ -96,7 +96,10 @@ class VersionsController < ApplicationController
             # IE doesn't support the replace_html rjs method for select box options
             render(:update) {|page|
               page.replace 'work_package_fixed_version_id',
-                           content_tag('select', '<option></option>'.html_safe + version_options_for_select(@project.shared_versions.open, @version).html_safe, id: 'work_package_fixed_version_id', name: 'work_package[fixed_version_id]')
+                           content_tag('select', '<option></option>'.html_safe + version_options_for_select(@project.shared_versions.open, @version).html_safe,
+                                       id: 'work_package_fixed_version_id',
+                                       name: 'work_package[fixed_version_id]',
+                                       class: 'form--select')
             }
           end
         end

spec/controllers/versions_controller_spec.rb

@@ -159,7 +159,9 @@ describe VersionsController, type: :controller do
       it 'returns updated select box with new version' do
         version = Version.find_by_name('test_add_version_from_issue_form')
 
-        select_substring = "select id=\\\"work_package_fixed_version_id\\\" name=\\\"work_package[fixed_version_id]\\\""
+        select_substring = "select class=\\\"form--select\\\"
+          id=\\\"work_package_fixed_version_id\\\"
+          name=\\\"work_package[fixed_version_id]\\\"".squish
         # selected option tag for the new version
         option_substring = "option value=\\\"#{version.id}\\\" selected=\\\"selected\\\""