Fix labels for project/snippet visibility selection

app/views/shared/_visibility_radios.html.haml

 - Gitlab::VisibilityLevel.values.each do |level|
   .radio
     - restricted = restricted_visibility_levels.include?(level)
-    = label model_method, level do
+    = form.label "#{model_method}_#{level}" do
       = form.radio_button model_method, level, checked: (selected_level == level), disabled: restricted
       = visibility_level_icon(level)
       .option-title

app/views/shared/snippets/_form.html.haml

@@ -11,7 +11,7 @@
       .col-sm-10= f.text_field :title, placeholder: "Example Snippet", class: 'form-control', required: true
 
     = render 'shared/visibility_level', f: f, visibility_level: visibility_level, can_change_visibility_level: true, form_model: @snippet
-    
+
     .form-group
       .file-editor
         = f.label :file_name, "File", class: 'control-label'