bug #437 Display the global form errors (thomasbeaujean, javiereguiluz)

This PR was merged into the master branch.

Discussion
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Display the global form errors

This finishes #436.

Commits
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e058b8f Tweaked the HTML of the global form errors
aaeeb17 The error div must not be display if there is no error
6e5adff Display the general form errors
57a2b77 Merge pull request #5 from javiereguiluz/master

Resources/views/default/form.html.twig

@@ -1,6 +1,10 @@
 {% trans_default_domain "EasyAdminBundle" %}
 
 {{ form_start(form, { attr: form.vars.attr|merge({ novalidate: 'novalidate' }) }) }}
+    {% if form.vars.errors|length > 0 %}
+        {{ form_errors(form) }}
+    {% endif %}
+
     <div class="row">
         <input type="hidden" name="referer" value="{{ app.request.query.get('referer', '') }}" />