add 'create a task for everyone, is available'

fet2020/templates/tasks/index.html

@@ -9,6 +9,9 @@
             {% csrf_token %}
             <label>User
             <select id="id_user" name="user">
+                <option value="all">
+                    Alle
+                </option>
                 {% for user in users %}
                     <option value="{{ user.id }}" {% if current_user == user.id %} selected {% endif %}>
                         {{ user.username }}
@@ -43,7 +46,7 @@
                     {% for task in group.list %}
                         <input type="checkbox" name="checkbox" value="{{ task.id }}" {% if task.completed %} checked {% endif %}>
 
-                        {{ task.title|truncatewords:10 }}</a>
+                        {{ task.title }}</a>
 
                         {{ task.due_date|date:"d.m.Y" }}