Use new alert syntax

(cherry picked from commit 7e2a56da)

aleksis/apps/alsijil/templates/alsijil/absences/register_confirm.html

@@ -21,15 +21,13 @@
           <i class="material-icons left">date_range</i>
           {{ form_data.date_start }}, {{ form_data.from_period }}. – {{ form_data.date_end }}, {{ form_data.to_period }}.
           {% if form_data.date_start != form_data.date_end %}
-            <div class="alert warning">
-              <div>
-                <i class="material-icons left">warning</i>
-                {% blocktrans %}
-                  As the length of this absence is longer than one day,
-                  please double check the correctness of your entry.
-                {% endblocktrans %}
-              </div>
-            </div>
+            <figure class="alert warning">
+              <i class="material-icons left">warning</i>
+              {% blocktrans %}
+                As the length of this absence is longer than one day,
+                please double check the correctness of your entry.
+              {% endblocktrans %}
+            </figure>
           {% endif %}
         </div>
         <div class="collection-item">

aleksis/apps/alsijil/templates/alsijil/excuse_type/warning.html

 {% load i18n %}
-<div class="alert warning">
-  <p>
-    <i class="material-icons left">warning</i>
-    {% blocktrans %}
-      This function should only be used to define alternatives to the default excuse which also will be counted extra.
-      Don't use this to create a default excuse or if you don't divide between different types of excuse.
-    {% endblocktrans %}
-  </p>
-</div>
+<figure class="alert warning">
+  <i class="material-icons left">warning</i>
+  {% blocktrans %}
+    This function should only be used to define alternatives to the default excuse which also will be counted extra.
+    Don't use this to create a default excuse or if you don't divide between different types of excuse.
+  {% endblocktrans %}
+</figure>

aleksis/apps/alsijil/templates/alsijil/group_role/partials/assigned_roles.html

@@ -36,12 +36,10 @@
   {% endfor %}
 </div>
 
-<div class="alert primary">
-  <div>
-    <i class="material-icons left">info</i>
-    {% blocktrans %}
-      You can get some additional actions for each group role assignment if you click on the name of the
-      corresponding person.
-    {% endblocktrans %}
-  </div>
-</div>
\ No newline at end of file
+<figure class="alert primary">
+  <i class="material-icons left">info</i>
+  {% blocktrans %}
+    You can get some additional actions for each group role assignment if you click on the name of the
+    corresponding person.
+  {% endblocktrans %}
+</figure>
\ No newline at end of file

aleksis/apps/alsijil/templates/alsijil/group_role/warning.html

 {% load i18n %}
-<div class="alert warning">
-  <p>
-    <i class="material-icons left">warning</i>
-    {% blocktrans %}
-      This function should only be used to define alternatives to the default excuse which also will be counted extra.
-      Don't use this to create a default excuse or if you don't divide between different types of excuse.
-    {% endblocktrans %}
-  </p>
-</div>
+<figure class="alert warning">
+  <i class="material-icons left">warning</i>
+  {% blocktrans %}
+    This function should only be used to define alternatives to the default excuse which also will be counted extra.
+    Don't use this to create a default excuse or if you don't divide between different types of excuse.
+  {% endblocktrans %}
+</figure>

aleksis/apps/alsijil/templates/alsijil/partials/persons_with_stats.html

 {% load data_helpers time_helpers i18n rules %}
 
 {% if not persons %}
-  <div class="alert primary">
-    <div>
-      <i class="material-icons left">warning</i>
-      {% blocktrans %}No students available.{% endblocktrans %}
-    </div>
-  </div>
+  <figure class="alert primary">
+    <i class="material-icons left">warning</i>
+    {% blocktrans %}No students available.{% endblocktrans %}
+  </figure>
 {% else %}
   <table class="highlight responsive-table">
   <thead>