Put forms from expandable sections into fieldset to ensure proper animation

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

app/views/admin/application_settings/_account_and_limit.html.haml

 = form_for @application_setting, url: admin_application_settings_path, html: { class: 'form-horizontal fieldset-form' } do |f|
   = form_errors(@application_setting)
 
+  %fieldset
     .form-group
       .col-sm-offset-2.col-sm-10
         .checkbox

app/views/admin/application_settings/_help_page.html.haml

 = form_for @application_setting, url: admin_application_settings_path, html: { class: 'form-horizontal fieldset-form' } do |f|
   = form_errors(@application_setting)
+
+  %fieldset
     .form-group
       = f.label :help_text, class: 'control-label'
       .col-sm-10
@@ -21,4 +23,5 @@
       .col-sm-10
         = f.text_field :help_page_support_url, class: 'form-control', placeholder: 'http://company.example.com/getting-help', :'aria-describedby' => 'support_help_block'
         %span.help-block#support_help_block Alternate support URL for help page
+
   = f.submit 'Save changes', class: "btn btn-success"

app/views/admin/application_settings/_pages.html.haml

 = form_for @application_setting, url: admin_application_settings_path, html: { class: 'form-horizontal fieldset-form' } do |f|
   = form_errors(@application_setting)
+
+  %fieldset
     .form-group
       = f.label :max_pages_size, 'Maximum size of pages (MB)', class: 'control-label col-sm-2'
       .col-sm-10
@@ -16,4 +18,5 @@
           sites. Users are required to demonstrate they control a domain before
           it is enabled
           = link_to icon('question-circle'), help_page_path('user/project/pages/getting_started_part_three.md', anchor: 'dns-txt-record')
+
   = f.submit 'Save changes', class: "btn btn-success"

app/views/admin/application_settings/_signin.html.haml

 = form_for @application_setting, url: admin_application_settings_path, html: { class: 'form-horizontal fieldset-form' } do |f|
   = form_errors(@application_setting)
+
+  %fieldset
     .form-group
       .col-sm-offset-2.col-sm-10
         .checkbox
@@ -53,4 +55,5 @@
       .col-sm-10
         = f.text_area :sign_in_text, class: 'form-control', rows: 4
         .help-block Markdown enabled
+
   = f.submit 'Save changes', class: "btn btn-success"

app/views/admin/application_settings/_signup.html.haml

 = form_for @application_setting, url: admin_application_settings_path, html: { class: 'form-horizontal fieldset-form' } do |f|
   = form_errors(@application_setting)
+
+  %fieldset
     .form-group
       .col-sm-offset-2.col-sm-10
         .checkbox

app/views/admin/application_settings/_visibility_and_access.html.haml

 = form_for @application_setting, url: admin_application_settings_path, html: { class: 'form-horizontal fieldset-form' } do |f|
   = form_errors(@application_setting)
+
+  %fieldset
     .form-group
       = f.label :default_branch_protection, class: 'control-label col-sm-2'
       .col-sm-10
@@ -40,13 +42,10 @@
           = link_to "(?)", help_page_path("integration/bitbucket")
           and GitLab.com
           = link_to "(?)", help_page_path("integration/gitlab")
-
     .form-group
-    .col-sm-offset-2.col-sm-10
-      .checkbox
-        = f.label :project_export_enabled do
-          = f.check_box :project_export_enabled
-          Project export enabled
+      = f.label :default_branch_protection, class: 'control-label col-sm-2'
+      .col-sm-10
+        = f.select :default_branch_protection, options_for_select(Gitlab::Access.protection_options, @application_setting.default_branch_protection), {}, class: 'form-control'
 
     -# EE-only
     - if ldap_enabled?
@@ -61,6 +60,13 @@
             If checked, group owners can manage LDAP group links and LDAP member overrides
             = link_to icon('question-circle'), help_page_path('administration/auth/ldap-ee')
 
+    .form-group
+      .col-sm-offset-2.col-sm-10
+        .checkbox
+          = f.label :project_export_enabled do
+            = f.check_box :project_export_enabled
+            Project export enabled
+
     .form-group
       %label.control-label.col-sm-2 Enabled Git access protocols
       .col-sm-10
@@ -74,4 +80,5 @@
         = f.label field_name, "#{type.upcase} SSH keys", class: 'control-label col-sm-2'
         .col-sm-10
           = f.select field_name, key_restriction_options_for_select(type), {}, class: 'form-control'
+
   = f.submit 'Save changes', class: "btn btn-success"