various enhancements for new tabs and bug fixes

templates/decision_form.html

@@ -77,9 +77,10 @@
             </div>
         </div>
 
+        {% if prefill_task_id is defined and prefill_task_id %}<input type="hidden" name="task_id" value="{{ prefill_task_id }}">{% endif %}
         <div class="form-actions">
             <button type="submit" class="btn btn-primary">{{ 'Save Changes' if item else 'Record Decision' }}</button>
-            <a href="{{ '/decisions/' ~ item.id if item else '/decisions' }}" class="btn btn-secondary">Cancel</a>
+            <a href="{{ '/tasks/' ~ prefill_task_id ~ '?tab=decisions' if prefill_task_id is defined and prefill_task_id else ('/decisions/' ~ item.id if item else '/decisions') }}" class="btn btn-secondary">Cancel</a>
         </div>
     </form>
 </div>