improve new branch page

app/views/projects/branches/new.html.haml

@@ -5,14 +5,14 @@
   .control-group
     = label_tag :branch_name, 'Name for new branch', class: 'control-label'
     .controls
-      = text_field_tag :branch_name, nil, placeholder: 'feature/dashboard'
+      = text_field_tag :branch_name, nil, placeholder: 'feature/dashboard', required: true, tabindex: 1
   .control-group
     = label_tag :ref, 'Create from', class: 'control-label'
     .controls
-      = text_field_tag :ref, nil, placeholder: 'master'
+      = text_field_tag :ref, nil, placeholder: 'master', required: true, tabindex: 2
       .light branch name or commit SHA
   .form-actions
-    = submit_tag 'Create branch', class: 'btn btn-create'
+    = submit_tag 'Create branch', class: 'btn btn-create', tabindex: 3
     = link_to 'Cancel', project_branches_path(@project), class: 'btn btn-cancel'
 :javascript