Alias should not be required for subject name

templates/subjects_add_update.html.tpl

@@ -38,7 +38,7 @@
 
     <div class="form-group">
       <label class="control-label" for="subject_alias">Nome alternativo</label>
-      <input type="text" name="Alias" class="form-control" id="subject_alias" placeholder="Nome alternativo" {{if .Options.Get "update"}} value="{{.Data.Subject.Alias}}" {{end}} required>
+      <input type="text" name="Alias" class="form-control" id="subject_alias" placeholder="Nome alternativo" {{if .Options.Get "update"}} value="{{.Data.Subject.Alias}}" {{end}}>
     </div>
 
     <div class="form-group">