Autoreload of plan

Introduce a switch to automatically reload the plan every x minutes. The interval can be specified via url, default is 5 minutes. There is a checkbox at the left bottom of the page showing the current state of autoreload and allowing to turn it on and off.

Utils/setup.sh

@@ -10,7 +10,7 @@ rm -rf venv/
 
 # Setup Python Environment
 # Requires: Virtualenv, appropriate Python installation
-virtualenv venv -p python3.7
+virtualenv venv -p python3.9
 source venv/bin/activate
 pip install --upgrade setuptools pip wheel
 pip install -r requirements.txt