Improve group edit page

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

app/views/groups/edit.html.haml

@@ -10,7 +10,9 @@
           %i.icon-folder-close
           Projects
       %li
-        = link_to 'LDAP', '#tab-ldap', 'data-toggle' => 'tab'
+        = link_to '#tab-ldap', 'data-toggle' => 'tab' do
+          %i.icon-book
+          LDAP
       %li
         = link_to '#tab-remove', 'data-toggle' => 'tab' do
           %i.icon-remove-sign
@@ -88,7 +90,7 @@
         .ui-box
           .title LDAP group settings
           %div.form-holder
-            = form_for @group do |f|
+            = form_for @group, html: { class: 'form-horizontal' } do |f|
               .form-group.clearfix
                 = f.label :ldap_cn, class: 'control-label' do
                   LDAP Group cn
@@ -110,7 +112,7 @@
                     You can manage permission levels for individual group members in the Members tab.
 
               .form-actions
-                = f.submit 'Save group', class: "btn btn-save"
+                = f.submit 'Save LDAP settings', class: "btn btn-save"
 
       .tab-pane#tab-remove
         .ui-box.ui-box-danger