Merge branch 'core-80-use-icons-instead-of-plain-text' into 'master'

Use icons instead of plain text. Advances BiscuIT-ng#80.

See merge request BiscuIT/BiscuIT-App-Alsijil!35

biscuit/apps/alsijil/templates/alsijil/lesson.html

@@ -78,7 +78,7 @@
       </div>
     </div>
     <button type="submit" class="btn btn-dark">
-      {% blocktrans %}Save{% endblocktrans %}
+      <span class="mdi mdi-content-save"></span>
     </button>
   </form>
 {% endblock %}

biscuit/apps/alsijil/templates/alsijil/manage_personal_note_filter.html

@@ -31,7 +31,7 @@
     {% csrf_token %}
     {% bootstrap_form personal_note_filter_form %}
     <button type="submit" class="btn btn-dark">
-      {% blocktrans %}Save{% endblocktrans %}
+      <span class="mdi mdi-content-save"></span>
     </button>
   </form>
 

biscuit/apps/alsijil/templates/alsijil/manage_personal_note_filters.html

@@ -31,7 +31,7 @@
     {% csrf_token %}
     {% bootstrap_form personal_note_filters_form %}
     <button type="submit" class="btn btn-dark">
-      {% blocktrans %}Save{% endblocktrans %}
+      <span class="mdi mdi-content-save"></span>
     </button>
   </form>
 

biscuit/apps/alsijil/templates/alsijil/register_absence.html

@@ -22,7 +22,7 @@
     {% csrf_token %}
     {% bootstrap_form register_absence_form %}
     <button type="submit" class="btn btn-dark">
-      {% blocktrans %}Save{% endblocktrans %}
+      <span class="mdi mdi-content-save"></span>
     </button>
   </form>