More flexible slotted labs
## Description Slotted labs currently only allow consecutive, same-length time slots. There are many use cases where this should be more flexible. ## Todo - Design a new time slot configuration and time slot viewing UI - The user should have full control over where time slots are placed, but it should not be harder to use than the current implementation. - The user should be able to view the created time slots, view who is in a time slot, kick people out of a time slot, delete a time slot, move a time slot, resize a time slot in time and capacity. - Do iterative design: make design, show to users, edit design, repeat. - Implement ## See also https://gitlab.ewi.tudelft.nl/eip/labrador/queue/-/issues/671 https://gitlab.ewi.tudelft.nl/eip/labrador/queue/-/issues/638 https://gitlab.ewi.tudelft.nl/eip/labrador/queue/-/issues/633
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