[Bug][Scheduler] Slot is not displayed if the end/start dates are reduced

[filipKovachev]

Describe the bug When the Scheduler view is set to a time range that ends at a time not on the hour (e.g., 11:15 or 11:30), it fails to display slots that overlap this period. For example, a slot from 00:00 to 23:59 does not show up. To Reproduce

1. Open this example: https://stackblitz.com/edit/pozdvd-vusbte?file=src%2Fmain.vue
2. Observe how when the end time of a scheduler item is set to 16:00, it does not appear in the 08:00-12:00 view. However, changing the end time to 15:00 makes it appear as expected

Expected behavior It should be able to show slots that span the entire day (00:00-23:59), even when the viewable time range in the scheduler is restricted (e.g., 7:00am to 11:15am).

Reported in Ticket ID: 1633873