Manage subscriptions now working correctly

Currently I am mostly testing an installation on Linux using Sqlite database. The longest process was getting the database migrations sorted out for Sqlite, other than that there were some issues with system paths but sofar mostly plain sailing.

I have a test site running on one of my Pi4 Snitz on a Pi

I have made a significant change to the calendar display, was having a few odd problems so have updated the javascript plugin (fullcalendar) to the latest version, the previous one was very old code. Need to make a few tweaks to the css but it behaves much better than the old one.