Some design improvements:

- Arrange print icon right
- Add line break for header information in LaTeX
- Show one-hour absences with only one number (e.g. 1.) instead of two (e. g. 1.-1.)
- Add dots to lesson numbers in absences

biscuit/apps/chronos/templates/timetable/latex/substitutions.tex

@@ -63,7 +63,7 @@ Stand: {% now "j. F Y H:i" %}\\
     {%  include "timetable/latex/hints.tex" %}
 
     {% if header_info.is_box_needed %}
-    \begin{tabular}{@{}ll@{}}
+    \begin{tabular}{p{0.26\linewidth}p{0.7\linewidth}}
     {% for row in header_info.rows %}
         \textbf{ {{ row.0 }} } & {{ row.1 }} \\
     {% endfor %}
@@ -103,7 +103,7 @@ Stand: {% now "j. F Y H:i" %}\\
 
         {# Background color #}
         {% if color_background %}
-        \rowcolor{ grey}
+        \rowcolor{grey}
         {% endif %}
 
         {# ------------------------------ #}

biscuit/apps/chronos/templates/timetable/subs/teacher.html

 {% if not sub.is_event %}
-    {% if sub.sub.type == 1 %}
+    {% if sub.sub.type == 1 and sub.sub.teacher_old %}
         <span class="tooltipped" data-position="bottom"
               data-tooltip="{{ sub.sub.teacher_old.name }}">
             <a href="{% url "timetable_smart_plan" "teacher" sub.sub.teacher_old.id %}">

biscuit/apps/chronos/templates/timetable/substitution.html

@@ -7,12 +7,10 @@
 
 <main>
     <div class="row no-margin">
-        <div class="col s12 m10">
+        <div class="col s12 m6">
             <h4>Vertretungen</h4>
         </div>
-        <div class="col l4 xl6">
-        </div>
-        <div class="col s12 m6 l4 xl3 right align-right">
+        <div class="col s12 m6 right align-right">
             <a class="waves-effect waves-teal btn-flat btn-flat-medium right"
                href="
                     {% if debug %}