Duplicate bookings are not displayed in all calendar views

[aivarii]

[x]: This is a bug and not a question.

[x]: I understand that the best way to resolve this issue is to solve it and propose a Pull Request.

Describe the bug**

If a resource has double bookings (if allowed), the double booking will not be displayed in the primary view of /Web/schedule.php.

To Reproduce**

Steps to reproduce the behavior:

1. Create two or more bookings for the same resource for the same timeslot.
2. View and compare the results at /Web/schedule.php by selecting different calendar views with the small calendar buttons at the top left.

Expected behavior**

All bookings should be visible in all calendar views.

Screenshots**

Calendar first view - shows only one booking:

Calendar second view - shows all the bookings:

Specifications

• LibreBooking develop branch: 8e7645b