Added functionality to allow downloading multiple photos as PDF in day sheet.

Fixed issue for appointment slots being returned that are beyond set booking range.

Added enabling/disabling for selected medium (clinic, video, or phone) in specialization in clinic settings.

Added enabling/disabling reminders for manually booked appointments.

Updates to Plug-in Support:

1. Added API support to allow uploading multiple files.

2. Included expiry text in email when sending files from plug-in.

3. Added support to view and update subscription for patients form plug-in.