Fix little errors

app/templates/user/submit.html

@@ -6,7 +6,13 @@
 {% block tab %}
 <form class="is-flex is-flex-direction-column" method="POST">
   <div class="my-6 has-text-centered is-flex is-flex-direction-column">
-    <span class="title">Zgłoś uczniów</span>
+    <span class="title">
+      {% if students %}
+        Edytuj zgłoszenie
+      {% else %}
+        Zgłoś uczniów
+      {% endif %}
+    </span>
   </div>
   {% csrf_token %}
   {{ formset.management_form | crispy }}
@@ -17,6 +23,11 @@
       <div class="column is-2">{{ form.grade | as_crispy_field }}</div>
     </div>
   {% endfor %}
-  <button class="button is-success mx-auto" type="submit">Zgłoś</button>
+
+  {% if students %}
+    <button class="button is-info mx-auto" type="submit">Edytuj</button>
+  {% else %}
+    <button class="button is-link mx-auto" type="submit">Zgłoś</button>
+  {% endif %}
 </form>
 {% endblock %}